Number line to 20 – Grade 1
Use a number line to 20 in Grade 1: jump right to add and left to subtract. Follow worked examples and try exercises with answers.
🎯 What you will learn
- ✓understand the method
- ✓solve exercises independently
- ✓check the answer
💡 How it works
Learn “Number line to 20 – Grade 1” in small steps: understand the method first, then practise with a worksheet or online test.
How it works
💡 Rule: every step on a number line is exactly 1.
A number line makes calculation visible. Move right for addition and left for subtraction.
Start at the first number and count steps for the second.
🧩 See the method
7→+ 1→+ 1→+ 1→+ 1→11
✍️ Worked examples
Worked examples 1
7 + 4
- 1.Start at 7.
- 2.Move 4 steps right.
- 3.Land on 11.
✓ 11
Worked examples 2
14 − 3
- 1.Start at 14.
- 2.Move 3 steps left.
- 3.Land on 11.
✓ 11
⚠️ Common mistakes
- • Moving right instead of left for subtraction.
📝 Try it yourself
1.
5 + 3
Show answer
8
2.
12 − 4
Show answer
8
3.
9 + 6
Show answer
15
4.
16 − 5
Show answer
11
Create matching questions
Create a compact printable worksheet or start an online test.
Learn next
FAQ
Where do I start?
Always at the first number.