Commutative number sentences II
This task is about completing number sentences.
Question
1
Change answer
a) For each problem, find the missing number and write it in the box.
i) 35 + 28 = 28 +
ii) 148 +
= 97 + 148
iii)
+ 496 = 496 + 375
iv) 919 + 762 =
+ 919
Question
1
Change answer
b) All the number sentences below are true. Explain why you know they are true without having to add up the numbers.
638 + 95 = 95 + 638
277 + 534 = 534 + 277
1 632 + 817 = 817 + 1 632
28 357 + 4 216 = 4 216 + 28 357
b) All the number sentences below are true. Explain why you know they are true without having to add up the numbers.
638 + 95 = 95 + 638
277 + 534 = 534 + 277
1 632 + 817 = 817 + 1 632
28 357 + 4 216 = 4 216 + 28 357
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