Number (add/sub)

Hong Kong

Stage 2

Use the commutative property of addition to fill in the missing number.

$1+9=9$1+9=9$+$+$\editable{}$

Easy

< 1min

Use the commutative property of addition to fill in the missing number.

Easy

< 1min

Use the commutative property of addition to fill in the missing number.

Easy

< 1min

Use the commutative property of addition to fill in the missing number.

Easy

< 1min

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