Number (add/sub)
Hong Kong
Stage 1
Patterns in addition and subtraction II
Interactive practice questions
$113+20=133$113+20=133
Use this to find:
a
$113+30=\editable{}$113+30=
b
$113+40=\editable{}$113+40=
c
$113+50=\editable{}$113+50=
d
$113+70=\editable{}$113+70=
Easy
1min
$10+111=121$10+111=121
Use this to find:
Easy
< 1min
We know that $18-3=15$18−3=15.
Use this to find:
Easy
< 1min
$113+24=137$113+24=137
Use this to find:
Easy
1min
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