fact-family/add-sub-within-10/medium · 套题 9

6 problems
1
Fact family for {3, 6, 9}: Write all 4 equations =
2
Fact family for {5, 9, 14}: Write all 4 equations =
3
Fact family for {9, 2, 11}: Write all 4 equations =
4
Fact family for {4, 6, 10}: Write all 4 equations =
5
Fact family for {3, 1, 4}: Write all 4 equations =
6
Fact family for {1, 10, 11}: Write all 4 equations =
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