What fact is missing from this fact family 20-1=191+19=2020-19=1

asked Nov 27, 2023 181k views

5 votes

by Wotuu

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A fact family is two addition sentences and two substraction sentences that all use the same numbers, so in this case, we need another addition

$19\text{ + 1 = 20}$

Amsiddh answered Dec 1, 2023

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