Addition to 100
Addition to 100 helps children practise revising and extending addition to 100 with a focus on mental strategies and checking with inverse tasks. Read the short guide and look through the examples before choosing online practice or a printable worksheet.
How to solve this
- Adding numbers within 100 in grade 3 focuses on fluency — aim to recall or calculate instantly.
- Use mental strategies: split into tens and ones, bridge through a round ten, or use known doubles.
- Check with a quick estimate: round both numbers to the nearest ten and verify the answer is close.
Examples
47 + 36 = ?
83
58 + 24 = ?
82
39 + 45 = ?
84