M 4 Lesson 22

Objective  Solve additions with up to four addends with totals within 200 with and without two compositions of larger units.

 Note: Addends are number that we add together

Fluency: Addition Fact Flash Cards 10+2 3+_=6 3+5 6+3 3+_=1 2+9 4+2 4+3 7+_=1 6+3 8+2 3+_=5 2+1 2+2 3+9 7+_=9 2+5 6+2 2+1 13=3+_

Fluency: Addition Fact Flash Cards 2+3 4+_=7 4+5 5+8 6+_=10 1+3 4+1 7+4 6+_=10 5+1 10+4 4+_=8 4+8 7+5 2+5 4+_=13 2+4 10+5 5+5 5+_=8

Fluency Subtractions from Tens  I say a basic fact. You add 10 to the whole and continue until I say to stop. Lets practice 10-6  4,

 Fluency: Crossing a Ten How many more does 8 need to make a 10? 8+__ =10  2 more  Complete the number sentence  8+2=10  10+1  11  8+2+1  11  8+3  11

 7+3 Fluency: Crossing a Ten  7+3+1  7+4  7+5  9+1  9+1+1  9+1+4  19+1+4

Application Problem  There are 38 apples, 16 bananas, 24 peaches, and 12 pear in the fruit basket. How many pieces of fruit are in the basket?

 Use any strategy that works for you.

 Show your partner your strategy  Here is my strategy

Concept Development  For this practice look for ways to make 10 ones or 10 tens to help you solve.

 Use the associative property to group the numbers  Raise your hand when you think you know what the answer is.

  3 + 7+ 6 23+27+16 • What helped you solve so quickly?

• Lets try another problem  Don’t solve this in a vertical addition; use mental math

Concept Development  Talk to your partner using place value language to explain how you can solve this problem mentally.  I added 23 and 27 first. I added the 2 tens, so 20+20=40. Then I added the ones. 7+3 equals 10, and 40+10 is 50.

 50 plus 16 equals 66.

Concept Development   3 + 7+ 6 23+27+16  123+27+16  How is this problem the same or different as the first two problems?

 Solve this problem using any strategy that works for you.

Concept Development   2+ 8+ 5 32+28+45  132+28+45 Remember when solving these problems we want to look for groups of 10 ones or 10 tens

    Concept Development 1+ 3+ 9+ 7 Can we add the numbers in any order?

31+23+19+47 We are going to do more addition problems. This time we will practice with four addends instead of three How is this problem the same as the first one?

 How is it different?

 Choose a strategy to solve. Then use the place value strategy to explain to your partner  Here are examples of how it was solved.

Problem Set  Practice with the problem set to practice the grouping numbers to make a new 10 or 10 tens.