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3 years ago

9

A. Fill in the boxes :

1 answer:

frosja888 [35]3 years ago

5 0

Step-by-step explanation:

it's simple:

8 tens + 19ones = 9 tens + 9 ones
8 tens + 2 ones =7 tens+12 ones
7 tens +25 ones = 9 tens + 5 ones
70+11=80+1
50+13=60+3
90+13=100+3

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