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Estimating Sum or Difference

Question

Simplify:
1. $28 - 3 \times 5 + 4$
2. $42 - 18 \div 2 \times 3$

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Solution

Verified by Toppr

1. $28 - 3 \times 5 + 4 = 28 - 15 + 4$
$= 17$
2. $42 - 18 \div 2 \times 3 = 42 - 9 \times 3$
$= 42 - 27$
$= 15$

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