✅ Inverse Operations Check True/False

About Inverse Operations Check True/False

Addition and subtraction undo each other, and that is not merely a fact about them — it is the only checking method a Grade 2 child has. If fifteen take away six leaves nine, then nine and six should give fifteen back; if it does not, something has gone wrong and the child can find it themselves. This worksheet drills that check until it is automatic. Every statement shows a subtraction together with the addition that is supposed to confirm it, and the child decides whether the check holds. The subtraction is always correct — what varies is whether the addition genuinely returns to the starting number. That is the design: if the subtraction were sometimes wrong too, the question would become "find the error somewhere" rather than "does this check work", and the relationship being taught would blur. Where the check fails, it fails by only one or two, so the answer has to be worked out rather than spotted. True and False are balanced by construction, half of each on every page, shuffled with no run longer than three. Eight statements per page with tick boxes and its own separate answer key. Its on-screen twin is Inverse Check Machine.

Common questions

Why is the subtraction always correct?

So the question stays "does this check work" rather than "find the error somewhere". Only the check varies.

How wrong are the failing checks?

By one or two, so the answer has to be worked out rather than spotted.

Why teach checking this early?

It is the only checking method a Grade 2 child has, and it lets them find their own errors.

Is the True/False split balanced?

Yes, by construction — half of each, with no run longer than three.