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Solving exercise 1 on page 156 of Math 2 textbook
Problem statement:
Calculate
Solving exercise 2 on page 156 of Math 2 textbook
Problem statement:
Set up the calculation and then compute:
a) 832 plus 152 equals 257 plus 321
b) 641 plus 307 equals 936 plus 23
Answer:
Solving exercise 3 on page 156 of Math 2 textbook
Problem statement:
Mental calculation (following the model):
a) 200 plus 100 equals 300 500 plus 100 equals 200 plus 200 equals
500 plus 200 equals 300 plus 100 equals 500 plus 300 equals
300 plus 200 equals 600 plus 300 equals 800 plus 100 equals
b) 800 plus 200 equals 1000 400 plus 600 equals 500 plus 500 equals
Answer:
a) 200 plus 100 equals 300 500 plus 100 equals 600
500 plus 200 equals 700 300 plus 100 equals 400
300 plus 200 equals 500 600 plus 300 equals 900
200 plus 200 equals 400
500 plus 300 equals 800
800 plus 100 equals 900
b)
800 plus 200 equals 1000
400 plus 600 equals 1000
500 plus 500 equals 1000
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