fact-family/add-sub-within-20/expert · Sarja 88

6 problems
1
Write the fact family for 19, 1, 20: =
2
Write the fact family for 6, 10, 16: =
3
Write the fact family for 3, 12, 15: =
4
Write the fact family for 8, 2, 16: =
5
Write the fact family for 11, 10, 110: =
6
Write the fact family for 3, 4, 12: =
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