Column Addition Subtraction Estimation
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Column Addition Subtraction Estimation
🎯 WALT: We Are Learning To estimate answers before calculating
Success Criteria:
✓ I can round numbers to the nearest 10
✓ I can estimate answers before calculating
✓ I can set out column addition and subtraction correctly
Part 1: Estimation Practice
a) 23 → _______ b) 47 → _______ c) 85 → _______ d) 91 → _______
34 + 28
Estimate: 30 + 30 = _______
Actual calculation:
76 - 29
Estimate: 80 - 30 = _______
Actual calculation:
Part 2: Column Method Practice
a) 45 + 37
Estimate: _______ + _______ = _______
Column method:
b) 123 + 89
Estimate: _______ + _______ = _______
Column method:
a) 84 - 36
Estimate: _______ - _______ = _______
Column method:
b) 156 - 78
Estimate: _______ - _______ = _______
Column method:
🌟 Extension Challenge
Support for Lower Ability/EAL:
• Use a number line to help with rounding
• Start with smaller 2-digit numbers
• Use base-10 blocks or counters to support understanding
Dyslexia-Friendly Tips:
• Use different coloured pens for tens and units
• Check your estimation is close to your answer
About This Worksheet
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Formatted for standard paper. Clean layout, easy to read.
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Created with Kuraplan's AI, designed for real classroom use.
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