A. Fill in the boxes:

8 tens + 19 ones = 9 tens +

ones

8 tens + 2 ones = 7 tens +

ones

7 tens + 25 ones = 9 tens +

ones

70 + 11 = 80 +

50 +

= 60 + 3

90 + 13 =

+ 3

S before he gave away the 10 marbles then his friend Mark had nine marbles then his friend gave him 9 more then his other friend gave him 18 War now how many marbles does Mark have gave him 20 marbles now how many marbles does he have

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