What are number line jumps?

Each problem, like 7 + 4, comes with a number line. Children start at the green dot, draw one jump for each one they add or take away, and write where they land.

Which ranges are there?

0 to 10, up to 20, and tens up to 100.

Are answer keys included?

Yes. The key draws the jumps and the answer.

Number Line Worksheets: Missing Numbers and Addition Jumps to 20 and 100

Seeing addition and subtraction

A number line shows adding as moving forward and taking away as moving back. It is the bridge from counting objects to mental maths.

In the Australian Curriculum

Year 1Representing and ordering numbers to at least 120 using number lines and charts (AC9M1N01).
Year 1Adding and subtracting within 20 with a range of strategies (AC9M1N04).
Year 3Mental strategies for bigger numbers (AC9M3A02), where jumps of ten are a common one.

Number lines are named in the Year 1 content description, and many Australian classrooms use the empty number line for jump strategies: to work out 38 + 14, start at 38, jump 10 to 48, then 4 more to 52. The tens-to-100 sheets here practise those jumps of ten.

From Year 4 the curriculum also puts fractions on the number line. This maker sticks to whole numbers, so use it for the early years and for mental addition and subtraction.

Summarised in our own words from the Australian Curriculum: Mathematics, Version 9.0 (ACARA).