Transcript Εργασία 21 - Greek Math

ΟΝΟΜΑ (NAME):________________________________
Εργασία 21 - Greek Math - (Homework) 21
(1A,1B,1C,1D,1E)
Dear Students,
This week we will be revising the numbers from 0 to 100 with their Greek names.
We will also learn how to find the missing number (greater/smaller),
using symbols ( + , -, ( ), = , > , < ) and comparisons in addition - subtraction problems .
Introduction to Mental Mathematics (Completion of a multiple of 10),
(Two digit plus a single/two digit integers), (Two digit minus a single digit integer).
QUIZ will be taken, in class, on Tuesday 2/21/2017.
Dear Parents,
Your children have been practicing similar exercises in class. Along with the example given
the beginning of each exercise, they are able to complete the task.
Please, remind them to return the packet on Friday 2/24/2017. Please, sign below
acknowledging your child has completed the assigned homework.
If you have any questions or concerns, please, contact me through email at
[email protected].
Thank you,
Mr Elias Papadopoulos
ΥΠΟΓΡΑΦΗ
(SIGN)
0
ΑΣΚΗΣΕΙΣ
(EXERCISES)
No school
QUIZ
1
2
Page
ΗΜΕΡΟΜΗΝΙΑ
(DATE)
Δευτέρα (Monday)
20 Φεβρουαρίου 2017
Τρίτη (Tuesday)
21 Φεβρουαρίου 2017
Τετάρτη (Wednesday) 22 Φεβρουαρίου 2017
Πέμπτη (Thursday)
23 Φεβρουαρίου 2017
Άσκηση 1: Κάνε τις αφαιρέσεις, χρησιμοποιώντας
την προσεταιριστική ιδιότητα
α-(β+γ)=(α-β)-γ
όπως στο παράδειγμα:
52-7=52-(2+5)=(52-2)-5=50-5=45
25-8=25-(5+3)=(25-5)-3=20-3=17
42-9=
24-6=
32-3=
73-8=
54-6=
91-2=
84-7=
Page
61-9=
1
72-4=
Άσκηση 2: Κάνε τις αφαιρέσεις, χρησιμοποιώντας
την προσεταιριστική ιδιότητα
(α+β)-γ=α+(β-γ)
όπως στο παράδειγμα:
80-3=(70+10)-3=70+(10-3)=70+7=77
50-8=(40+10)-8=40+(10-8)=40+2=42
70-7=
30-4=
40-2=
80-5=
60-6=
90-8=
100-7=
Page
50-3=
2
20-2=