fact-family/add-sub-within-20/expert · 세트 13

6 problems
1
Write the fact family for 16, 2, 18: =
2
Write the fact family for 6, 6, 12: =
3
Write the fact family for 14, 4, 18: =
4
Write the fact family for 8, 2, 16: =
5
Write the fact family for 7, 6, 13: =
6
Write the fact family for 2, 8, 10: =
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