fact-family/mul-div-within-20-write-all · 세트 76

6 problems
1
Write the fact family for 2, 2, 4: =
2
Write the fact family for 3, 6, 9: =
3
Write the fact family for 13, 4, 17: =
4
Write the fact family for 11, 8, 19: =
5
Write the fact family for 11, 7, 18: =
6
Write the fact family for 4, 6, 10: =
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