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Math · 5th Grade
Powers of Ten
Why multiplying by 100 moves the digits two places, every time.
How to use it
Say 'the digits move', never 'add a zero'. Decimals prove why.
Free · print-ready PDF · US Letter and A4
- Grade
- 5th Grade
- Ages
- 10–11
- Subject
- Math
- Pages
- 1
The rest of the 5th Grade wall
49 more posters, all free to print — 11 of them here.
Adding Unlike FractionsDifferent denominators have to be made the same before anything can be added.Subtracting Unlike FractionsSame first step as adding — match the denominators, then take away.Multiplying FractionsStraight across — and the surprise that the answer gets smaller.Dividing FractionsKeep, change, flip — and why the answer comes out bigger.Simplifying FractionsThe same amount, written with the smallest numbers possible.Comparing FractionsThree reliable methods, and when each one is quickest.Order of OperationsPEMDAS with the two rules everyone gets wrong, worked out step by step.Decimals & RoundingPlace value to thousandths plus a rounding rule with a number-line picture.Fraction RulesAdd, subtract, multiply and divide fractions — one worked example each.Area & PerimeterFormulas for every shape they meet this year, with a labelled diagram each.Multiplying DecimalsIgnore the points, multiply, then count them back in.