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 math.

Provincial curriculum links

BC Grade 1Counting on and counting back, and mental math strategies to 20.
BC Grade 2Adding and subtracting to 100 with an open number line, a hundred chart and ten frames.
ON Grade 1–2Numbers up to 50 in Grade 1 and up to 200 in Grade 2.

BC names the open number line in Grade 2: a blank line where students mark only the jumps they make, such as +10, +10, +3. The marked lines on these sheets are a good step before that, since every number is shown. Once students are confident, ask them to draw their own line beside each problem and make bigger jumps.

The 0 to 10 and 0 to 20 lines suit Grade 1 in both provinces. The tens to 100 lines fit Grade 2 in BC and Ontario, where adding and subtracting tens is a key step toward mental math.

Summarized in our own words from the BC Mathematics curriculum (Grades 1–2) and Ontario’s overview of The Ontario Curriculum, Grades 1–8: Mathematics (2020).