Number walls to 100 – Grade 2
Number walls to 100 for Grade 2: solve four-row walls, practise bridging tens and check with the top brick. Create a free worksheet or try an online test.
🎯 What you will learn
- ✓Solve walls with four rows
- ✓Add two-digit numbers bridging tens
- ✓Record calculations clearly
💡 How it works
In Grade 2 the walls get taller: four bricks at the bottom, six additions and a top brick up to 100. Work row by row and you will reach the top safely.
How it works
💡 Row by row from the bottom: first all bricks in row two, then row three, then the top brick.
A four-row wall has four numbers at the bottom. They make three bricks in row two, two in row three and one top brick – six additions in total.
Numbers grow quickly towards the top. Add two-digit numbers in steps: tens first, then ones, e.g. 27 + 18 = 37 + 8 = 45.
🧩 See the method
✍️ Worked examples
Worked examples 1
The bottom row is 7, 12, 9 and 5. What is the top brick?
- 1.Row two: 7 + 12 = 19, 12 + 9 = 21, 9 + 5 = 14.
- 2.Row three: 19 + 21 = 40, 21 + 14 = 35.
- 3.Top brick: 40 + 35 = 75. Check: 7 + 3 × 12 + 3 × 9 + 5 = 75.
✓ 75
Worked examples 2
The bottom row is 10, 4, 8 and 13. What is the top brick?
- 1.Row two: 14, 12, 21.
- 2.Row three: 14 + 12 = 26, 12 + 21 = 33.
- 3.Top brick: 26 + 33 = 56 + 3 = 59 (tens first, then ones).
✓ 59
⚠️ Common mistakes
- • Skipping a row and jumping to the top. Each row has exactly one brick fewer than the row below.
- • Forgetting the ten when bridging, e.g. 27 + 18 = 35. Correct: 27 + 18 = 45.
📝 Try it yourself
1.
5 | 8 | 6 | 3
Show answer
13 | 14 | 9 → 27 | 23 → 50
2.
9 | 4 | 11 | 2
Show answer
13 | 15 | 13 → 28 | 28 → 56
3.
6 | 10 | 7 | 8
Show answer
16 | 17 | 15 → 33 | 32 → 65
4.
12 | 3 | 9 | 6
Show answer
15 | 12 | 15 → 27 | 27 → 54
5.
4 | 13 | 5 | 11
Show answer
17 | 18 | 16 → 35 | 34 → 69
6.
8 | 7 | 14 | 1
Show answer
15 | 21 | 15 → 36 | 36 → 72
Create matching questions
Create a compact printable worksheet or start an online test.
Learn next
FAQ
How hard are number walls in Grade 2?
The bottom bricks are usually one-digit or small two-digit numbers and the top brick is between 50 and 100. Children practise bridging tens up to 100.
Are the walls available with answers?
Yes. Turn on “Include answers” – the PDF then contains a page with every wall filled in.