Number (add/sub)

Hong Kong

Stage 1

We know that $5-2=3$5−2=3.

Use this to find:

a

$25-2=\editable{}$25−2=

b

$35-2=\editable{}$35−2=

c

$45-2=\editable{}$45−2=

d

$75-2=\editable{}$75−2=

Easy

< 1min

Use what you know about subtracting to find:

Easy

< 1min

We know that $17-5=12$17−5=12.

Use this to find:

Easy

< 1min

We know that $16-5=11$16−5=11.

Use this to find:

Easy

< 1min

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