Stage 2 · Unit 12 / 44 · Numbers & Operations
Adding and subtracting together
Turn one addition into two subtractions, and one subtraction into two additions.
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Switch between + and −
If 3 + 2 = 5 then 5 − 2 = 3 and 5 − 3 = 2.
Switch within 20
· Not the suggested orderAbout Adding and subtracting together practice
“Adding and subtracting together” is unit 12 of Stage 2, for ages 7–8, in numbers & operations. Turn one addition into two subtractions, and one subtraction into two additions.
Its steps are: Switch between + and −, Switch within 20. Each step has 10 problems and is free with no sign-up. 90% or better earns three stars.