fact-family/add-sub-within-20/expert · Satz 47

6 problems
1
Write the fact family for 10, 9, 90: =
2
Write the fact family for 4, 9, 36: =
3
Write the fact family for 10, 5, 15: =
4
Write the fact family for 6, 5, 30: =
5
Write the fact family for 1, 8, 9: =
6
Write the fact family for 8, 4, 32: =
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