
What’s inside: This 13-page Upper KS2 pack teaches one big idea: addition and subtraction undo each other. It starts with an Adult Toolkit for the grown-up, with worked examples and teaching tips for bar models and fact families, missing numbers, “I think of a number” puzzles and multi-step word problems. Kids crack a secret code with 13 missing-number questions using whole numbers and decimals, and the code key has trap answers that catch wrong operations. They then cut out 24 Squishy Family fact cards to sort into bar models (two “squish-up” cards have mistakes to spot) and play a 12-card “I have… who has?” loop game. Six Squishy Shop word problems follow. It finishes with an “I can…” tracker and full answers.
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