Transcript MATH SECOND GRADE

MATH SECOND GRADE
MEASUREMENT 2
I can jump
up to add.
I can jump
back to
subtract.
Look at the ruler.
We can use a ruler to help us add and subtract.
A ruler is just like a number line. We can jump using
standard ( inches, feet, yards ) or metric ( centimeters, meters ).
We can jump up to add. We can jump back to subtract.
This little bunny is adding numbers by jumping
on the number line.
+3
+3
+2
3 + 3 + 2 = ?
3
First, he added 3. Then he added 3 more. Then he added 2.
What number did the little bunny stop on? ? = _____
You can skip count or count by using a number line.
You can add or subtract by using standard or metric rulers.
1 +
15 - 5 -
= 7
= 4
Little frog knows how to
use a number line to add.
0 + 2 + 2 + 2 + 2 + 2 = ____
Little frog can start at ____ jump 10 and end up at 15
using a number line. ____ + 10 = 15
Little frog is jumping up to add. Can you write the number
sentence for little frog?
____ + ____ = ____
Little frog wants to jump the same number sentence on a ruler.
Can you draw his jumps for him?
Write the number sentence that goes with each number line.
This little bunny wants to subtract by hopping down
the metric ruler. Draw the hops the bunny will
make for this equation:
20 - 4 = ____
Look at the number lines.
Can you make the same
number sentences on a
metric ruler? Show your jumps!
Use the metric ruler to help you solve each equation.
Liam holds the record for long jumps at his school.
He can jump 6 feet from a standing position.
Liam wants to increase his jump to 7 feet.
How much farther does Liam need to jump?
Charlotte is cutting flowers for her mom.
Each stem is 10 inches long.
Charlotte wants the stems to be 8 inches long.
How much should she cut off?
6 + ? = 7
___ + ___ = ___
10 - ? = 8
____ - ____ = ____
Use the standard ruler to help you solve each equation.
Noah had a rope that measured 11 yards
in length. Noah cut some of the rope.
Now the rope is 7 yards in length.
How much did Noah cut off?
Amelia has a 9 inch ribbon for her hair.
She cut the ribbon to make it 5 inches long.
How much ribbon did Amelia cut off?
_____ - _____ = _____
_____ - _____ = _____
Use the metric ruler to help you solve each equation.
Aria had a candy bar that was 8 inches long.
She took a big bite. Now her candy bar is only 5
inches long. How big was her bite?
Oliver needed a long piece of paper.
He took a 16 inch piece of paper and taped
another 7 inch piece of paper to it.
How long is his paper now?
_____ - _____ = _____
_____ + _____ = _____
Use the standard ruler to help you solve each equation.
Ethan wants to draw a 9 foot line on his driveway.
First he draws a 6 foot line.
How long should the next line be to reach 9 feet?
_____
_____ = _____
Olivia wants her hair to be 11 inches long.
Her mom measured her hair and found that
her hair needs to grow 5 more inches.
How long is Olivia’s hair now?
_____
_____ = _____
Use the metric ruler to help you solve each equation.
Violet is reading a chapter book. She has already
Asher’s race car sped across the finish line in only 24
read 13 chapters but wants to finish the book before seconds. He wants his car to cross the finish line in
the weekend. There are 19 chapters in the book.
21 seconds. How much faster does his car have to
How many chapters does she still need to read?
be to accomplish this?
_____
_____ = _____
_____
_____ = _____
Use the metric ruler to help you solve each equation.
Ava threw the ball 25 meters. Sophia threw the
ball 3 meters farther than Ava. How far did
Sophia throw the ball?
_____
_____ = _____
Benjamin swims 13 laps each day.
He wants to be able to swim 20 laps daily by
the end of summer. How many more laps does he
need to swim to reach his goal?
_____
_____ = _____
Use the metric ruler to help you solve each equation.
Nalia’s puppy is only 9 inches tall. Her mother says
that the puppy will grow to be 26 inches tall.
How much taller will her dog be when he is grown?
_____
_____ = _____
Henry wants to learn 30 news words each month.
He has already learned 17 words. How many
more does he need to learn to reach his goal?
_____
_____ = _____
Use a portion of a meter stick to help you solve each equation.
Owen has 82 cars in his collection. His goal is to
have 95 cars by his birthday. How many more cars
does Owen need to reach his goal?
_____
_____ = _____
Emma has saved 75 cents. She needs to save
18 more cents to buy a granola bar. How much
does the granola bar cost?
_____
_____ = _____
Use a portion of a meter stick to help you solve each equation.
Scarlett can’t wait to show off her sticker collection.
She had 87 stickers but some got lost.
Now she only has 72 stickers.
How many got lost?
_____
_____ = _____
Caleb wants a new bike that costs 94 dollars.
He has already saved 77 dollars.
How much more does he need to save?
_____
_____ = _____
Use the meter stick to help you solve each equation.
Jackson had 98 fish in his aquarium.
He gave some away. Now he has 89 fish.
How many fish did he give away?
_____
_____ = _____
Seventy-four second grade students are going
on a field trip. Twelve parents and seven teachers
are going with them. How many are going on the
field trip?
____
____
____ = _____
Create your own number line to solve each equation.
Grayson has 18 Lego sets. He has asked for 3 more
sets for his birthday. If Grayson gets his wish, how
many Lego sets will he have?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Xavier spent 49 dollars on a skateboard and a
new helmet. The helmet costs 14 dollars. How much
did the skateboard cost?
_____
_____ = _____
Create your own number line to solve each equation.
Nora and Noah are twins. Noah is 52 inches tall
but Nora is only 47 inches tall. How much
shorter is Nora than her brother Noah?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Audrey and Vivienne are serious about recycling.
They have collected 72 plastic bottles to recycle. They
want to collect 100 bottles. How many more do they
need to collect to reach their goal?
_____
_____ = _____
Create your own number line to solve each equation.
Aurora is measuring material to make a dress.
She needs 62 inches of fabric.
The fabric is 100 inches long. How much extra
material will Aurora have left over?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Declan jumped his bike 84 inches.
His friend Levi jumped 91 inches.
How much farther did Levi jump than Declan?
_____
_____ = _____
Create your own number line to solve each equation.
Landon is drawing a hopscotch on the sidewalk.
He draws the first square with 22 inch sides.
He wants the next square to be 6 inches bigger.
How big should he draw the next square?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Alexander cut a 59 inch piece of bamboo to make a
cane pole. His dad’s cane pole needs to be 23 inches
longer. How big should Alexander cut the next piece
of bamboo?
_____
_____ = _____
Create your own number line to solve each equation.
Aidan has joined the golf team. His golf club is 73
centimeters long. His brother is taller and needs a
golf club that is 18 centimeters longer. How long
should his brother’s golf club be?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Lilly’s bedroom door is 36 inches wide and 60 inches
tall. How much taller is the door than it is wide?
_____
_____ = _____
Create your own number line to solve each equation.
Fynn catches a fish that is 37 centimeters larger than
Elijah’s fish. Elijah’s fish was 68 centimeters long.
How long was Fynn’s fish?
_____
_____ = _____
Write in the numbers below. Show your jumps!
Abigail needs a baseball bat for practice.
Her brother’s bat is 90 centimeters long. Her bat
should be 25 centimeters shorter. What should be
the measurement of her bat?
_____
_____ = _____
Many times you will not have a ruler or a number line to help.
You can draw your own equally spaced lines to create a number
line to help you add or subtract.
You can use the lines
on your notebook paper.
The lines are evenly spaced.
You can use graph paper boxes.
Set up your number line to help solve the equation.
Gavin’s TV screen is 48 inches.
Ella’s screen is 9 inches larger.
How wide is Ella’s TV screen?
_____ _____ = _____
Chloe and Adalyn got a new 18 foot pontoon boat.
Lucas and his family got a 27 foot camper.
How much smaller is the boat than the camper?
____ ____ = ____
Gabriel wants to hang a rope swing from the big tree
in his front yard. He needs
17 feet of rope. He finds
32 feet of rope in his garage.
How much should he cut off?
_____ _____ = _____
Elizabeth and Alice are planning a party. They want to have
games and races. They measure off a sack race course of 22 feet.
They try out the course and Alice falls down at 17 feet. How
much farther did she need to run to complete the race?
____
____ = ____
Grace is going on a mini road trip with her parents. They travel
45 miles Friday night. They need to travel another 53 miles on
Saturday. How long is their trip?
____ ____ = ____
Elliott and Emmett have 100 homes on their paper route.
Elliott throws 61 papers each morning. Emmett throws the rest.
How many papers does Emmett
throw each morning?
____ ____ = ____
Harper is building a fence. She needs 80 meters of wire to
complete her fence. She only finds 63 meters of wire in the
barn. How much more wire will
she need to buy?
____ ____ = ____
Thinking about math is fun.
When you use a number line
or a ruler to help you you
can talk about the math
as you add and subtract.
I had 12 stickers but I lost 3. How many do I have now?
I drew a number line on my paper. I started at 12.
I moved back 3 because I lost some stickers.
I have 9 stickers left.
2
4
6
12 - 3 = ?
8
10
12
Can you talk about the math?
Give it a try.
My equation is
51 - 14 = ?
My equation is
18 + 11 = ?
My equation is
75 - ? = 52
Can you talk about the math?
My equation is
68 - 56 = ?
My equation is
100 - 89 = ?
My equation is
21 - ? = 19
Can you talk about the math?
My equation is
93 - 71 = ?
My equation is
56 + 38 = ?
My equation is
? - 7 = 74
Another tool you can use to help you talk
about the math is a hundreds chart or hundreds board.
In the morning there were 15 students
waiting in the cafeteria. 11 more students
came in for breakfast. The bell rang and
some students went to class. Now there
are 13 students in the cafeteria.
How many students went to class?
15 + 11 - _____ = 13
In the morning there were 15 students waiting in the
cafeteria. 11 more students came in for breakfast.
The bell rang and some students went to class.
Now there are 13 students in the cafeteria.
How many students went to class?
15 + 11 - _____ = 13
TALK ABOUT THE MATH!
I used a hundreds board. I started at 15
and moved down one row which is 10 more,
then I moved 1 to the right and landed on
26. This shows the 11 that came in. Starting
at 26 I need to move back to 13 because that is how
many students are left. I move up one row to 16 and then 3 to the left.
I moved back a total of 13 spaces. That means that 13 students left the cafeteria.
Now you try some.
The School Store was open. 17 students
were buying pencils, 22 students were buying
paper and some students wanted erasers.
There were 43 students at the school store.
How many wanted to buy an eraser?
TALK ABOUT THE MATH!
____________________________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
____________________________________________
WRITE THE EQUATION HERE
The second grade is going on a field trip. Ms.
Brinkerhoff and Ms. Clements have 27 students. Mrs.
Grant and Ms. Horne have 31 students and Ms.
Staggers and Ms. Troutman have some students. A
total of 79 students are going on the field trip.
How many students are in Ms. Staggers and Ms.
Troutman’s rooms?
TALK ABOUT THE MATH!
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
WRITE THE EQUATION HERE
It is wheeled vehicle day at school. 32 students
rode their bikes, some students rode skateboards,
and 17 students had roller blades. A total of 73
students attended wheeled vehicle day.
How many students had skateboards?
TALK ABOUT THE MATH!
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
WRITE THE EQUATION HERE
The school wanted to sell doughnuts to earn
money for field trips. They ordered some
doughnuts with sprinkles and 24 plain doughnuts.
They sold 49 doughnuts all together and have 11
doughnuts left over.
How many doughnuts with sprinkles did they have?
TALK ABOUT THE MATH!
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
WRITE THE EQUATION HERE
William invited the entire class to his party.
He also invited 18 friends from his neighborhood.
His mother baked 40 cupcakes and got lots of
ice cream and treats. William was sad because 11
kids could not come to his party. How many kids
are in his class? TALK ABOUT THE MATH!
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
______________________________________________
WRITE THE EQUATION HERE
You have learned to use different tools to help you solve addition and subtraction equations.
You have used a number line.
You have used a standard or metric ruler.
You have used paper to draw your own number line.
You have used a hundreds chart or hundreds board.
Use whatever tool helps you solve the equations on the following slide.
Determine the unknown number in each equation. Solve for
?
32 + 7 = ?
76 - ? = 23
? + 15 = 90 - 35
? = _____
? = _____
? = _____
43 + 6 = 17 + ?
88 - 46 = 1 + ?
19 + ? = 47 - 3
? = _____
? = _____
? = _____
52 + ? = 10 + 61
48 + 10 + 10 = ? + 2
50 - 23 + 11 = 16 + ?
? = _____
? = _____
? = _____
MATH SECOND GRADE
MEASUREMENT 2