Maths · Rung 13 of 30

Decimals

A fraction is a division: 3/4 = 0.75. A decimal becomes a percentage when you multiply by 100: 0.75 = 75%. Multiplying by 10 moves the point one place right; dividing, one place left.

Where this sits

Opens up
Units and estimation

Exercises from this rung

Generated by the app, from easiest to hardest

  1. 5.35 × 100

    • 535
    • 5350
    • 105.35
    • 53.5

    Why Multiplying by 100 moves the point two places right: 535.

    easier

  2. 0.91 × 0.1

    • 0.0091
    • 1.01
    • 0.91
    • 0.091

    Why Multiplying by 0.1 moves the point one place left: 0.091.

    in between

  3. 1.68 + 2.13

    • 3.81
    • 4.81
    • 3.91
    • 3.8

    Why Add hundredths to hundredths and units to units: 1.68 + 2.13 = 3.81.

    harder