fact-family/add-sub-within-100/hard · 套题 99

6 problems
1
Write the fact family for 17, 32, 49: =
2
Write the fact family for 21, 76, 97: =
3
Write the fact family for 53, 24, 77: =
4
Write the fact family for 57, 24, 81: =
5
Write the fact family for 4, 3, 12: =
6
Write the fact family for 83, 6, 89: =
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