Using the fact family of $4$4, $4$4, and $8$8.

$+$+ | $=$= | |||

$4$4 | $+$+ | $4$4 | $=$= | $8$8 |

What is $8-4$8−4?

Easy

< 1min

Using the fact family of $6$6, $6$6, and $12$12:

Easy

< 1min

Using the fact family of $8$8, $7$7, and $15$15.

Easy

1min

Using the fact family of $9$9, $5$5, and $14$14:

Easy

1min

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