Step 2 / 3

Subtract on a number line

★★★Not the suggested order

Start at 17 and jump 5 to the left: 12.

Addition Village · Learn first

Example

Use the number line to subtract.

Answer: 18

Steps in this unit · Teen minus a digit

1 2 3

← 6−4 and 16−4 Teen minus a digit →

Teen minus a digit · Numbers & Operations

If you know 6 − 4 = 2, you know 16 − 4 = 12. Subtract the ones and keep the ten.

Start at 17 and jump 5 to the left: 12.

This is step 2 of unit 25, “Teen minus a digit”, in Stage 1: Numbers to 20, adding and subtracting (ages 6–7). A round has 8 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.