$12-4=8$12−4=8. Use this to find:

a

$22-4=\editable{}$22−4=

b

$32-4=\editable{}$32−4=

c

$42-4=\editable{}$42−4=

d

$72-4=\editable{}$72−4=

Easy

Less than a minute

We know that $9-2=7$9−2=7.

Use this to find:

$113+14=127$113+14=127

Use this to find:

$116+20=136$116+20=136

Use this to find:

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Describe, continue and create patterns with fractions, decimals and whole numbers resulting from addition and subtraction