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primary 6 | Maths
| Measurement
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Can someone help me with this question with assumption method and not guess and check
20 × $1.50 = $30
$18 + $30 = $48
$1.50 + $2.50 = $4
$48 ÷ $4 = 12 (Ans)
Chk
C → 12 × $2.50 = $30
S → (20-12) × $1.50 = $12
C-S = $30 - $12 = $18 ✓✓✓
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