Number (add/sub)
Hong Kong
Stage 1
Patterns in addition III
Interactive practice questions
$12+13=25$12+13=25
Use this to find:
a
$22+13=\editable{}$22+13=
b
$32+13=\editable{}$32+13=
c
$42+13=\editable{}$42+13=
d
$72+13=\editable{}$72+13=
Easy
1min
$12+13=25$12+13=25
Use this to find:
Easy
1min
$11+17=28$11+17=28
Use this to find:
Easy
1min
$11+25=36$11+25=36
Use this to find:
Easy
1min
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