11+ Decimals
Master decimal place values, column addition and subtraction, rounding, and powers of 10. Practise with our interactive explorer and complete timed exam-style sets.
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Untimed decimals test
10 questions · drawn from 70 · no timer · unlimited retakesPractise without a timer. Each attempt selects ten questions from the 70-question bank, with an explanation for every question.
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Timed decimals test
10 questions · drawn from 70 · 5 minutes · unlimited retakesWork against the clock for five minutes. Each attempt selects ten questions from the 70-question bank, with an explanation for every question.
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Year 4 decimals test
10 questions · drawn from 60 · no timer · unlimited retakesBuild Year 4 confidence without a timer. Each attempt selects ten questions from the 60-question bank, with an explanation for every question.
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Interactive Decimals Explorer Lab
Interactive Practice · 5 ModulesExplore decimal place values, visual order comparisons, rounding simulations, step-by-step column addition/subtraction, and dynamic powers-of-10 decimal shifts.
Decimals Methods & 11+ Exam Rules
Learn key place value columns, the rules for shifting digits when multiplying or dividing by 10, 100, and 1000, and standard 11+ methods for column calculations.
Place Values & Powers of 10
Master column positions and digit shifts for fast mental and written decimal maths.
| Operation | Digit Shift Direction | Quick Example |
|---|---|---|
| × 10 | Shift digits 1 place LEFT | 4.25 × 10 = 42.5 |
| × 100 | Shift digits 2 places LEFT | 4.25 × 100 = 425 |
| × 1000 | Shift digits 3 places LEFT | 4.25 × 1000 = 4250 |
| ÷ 10 | Shift digits 1 place RIGHT | 4.25 ÷ 10 = 0.425 |
| ÷ 100 | Shift digits 2 places RIGHT | 4.25 ÷ 100 = 0.0425 |
| ÷ 1000 | Shift digits 3 places RIGHT | 4.25 ÷ 1000 = 0.00425 |
3 Core 11+ Calculation Rules
Follow standard GL & CEM working steps to eliminate easy calculation traps.
Column Addition & Subtraction
Strictly line up the decimal points in a vertical column. Fill empty spaces with placeholder zeros before subtracting.
4.5 − 1.28 → 4.50 − 1.28 = 3.2210 − 8 = 2.Multiplying Decimals
Multiply as whole integers first. Then count the total decimal places across both numbers and move the point left from the end.
0.04 × 0.7 → 4 × 7 = 28 (3 d.p. total) → 0.0280.028, not 0.28.Dividing Decimals (Scaling Method)
Make the divisor (second number) a whole number by multiplying both numbers by 10, 100, or 1000.
4.8 ÷ 0.06 → (4.8 × 100) ÷ (0.06 × 100) = 480 ÷ 6 = 80Decimals Practice Worksheet 🔒 Members
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