Problem solving, step by step

Write one step at a time. The tutor works out which method you're using and checks each step.

Pick a problem on the left to start.

How to write a step

4 x 18 = 72 · 72 / 6 = 12 · 2/3 x 18 = 12 · 12 - 4 = 8 · gcf(6, 8) = 2 · lcm(4, 7) = 28 · 21 > 20 · 3:4 != 5:7 · plot (3, 4) (5, 7). Decimals can be rounded: 4 / 6 = 0.667. Pick an option by clicking it or typing its number.

Each problem links to its map of methods: every first step a student might write, and where each leads.