fact-family/add-sub-within-20/hard · Sett 21
6 problems
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1
Write the fact family for 18, 2, 20:
=
2
Write the fact family for 5, 10, 15:
=
3
Write the fact family for 12, 4, 48:
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4
Write the fact family for 10, 5, 15:
=
5
Write the fact family for 5, 4, 20:
=
6
Write the fact family for 13, 2, 15:
=