Decimals and percentages · Usually met around P5
Multiplying decimals
From “Decimals ×10, ×100, ×1000” to “Rounding decimals”, step by step, each skill with its methods, worked examples and answers.
Skills in this topic, easy to hard
- Decimals ×10, ×100, ×1000Each zero moves the point one place right
- Powers of 10The small number on 10 = how many 0s after the 1
- Multiplying by 0.1, 0.01 and 0.001× 0.01 is ÷ 100: the point moves two places left
- Multiplying decimalsMultiply as whole numbers, count the places
- Rounding decimalsExact product first, round at the end