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Hong Kong
Stage 1

Patterns in addition II

Interactive practice questions

Use what you know about addition to find:

a

$9+2=\editable{}$9+2=

b

We know that:

$9+2=11$9+2=11.

Use this to find:

$19+2=\editable{}$19+2=

c

We know that

$9+2=11$9+2=11.

Use this to find:

$9+12=\editable{}$9+12=

Easy
< 1min

$19+2=21$19+2=21. Use this to find:

Easy
< 1min

$2+19=21$2+19=21. Use this to find:

Easy
< 1min

Fill in the boxes with the missing numbers.

Easy
< 1min
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