Counting on and back in tens and ones is one of those “small skills” that unlocks big maths. When students add or subtract tens, they’re learning a fundamental idea: it only changes the tens digit (the ones stay the same). That’s place value in action - not just “getting an answer”. And when we bridge over 100, things level up again. Students have to unitise (treat ten as a unit), reorganise the place value, and keep track of what’s happening to the number as it crosses that boundary. That’s pow
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Counting on and back in tens and ones is one of those “small skills…
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