HOTS Mathematics Primary 5 Decimals

Siti earns $12.50 per hour. She works 3.5 hours on Monday and twice as many hours on Tuesday. She spends $28.40 on transport that week. How much money does she have left after paying for transport?

A $102.85
B $74.45
C $87.50
D $131.25
Show Worked Solution

Worked Solution

Step 1: Monday hours = 3.5 h. Tuesday hours = 3.5 × 2 = 7 h. Step 2: Monday earnings = 3.5 × $12.50 = $43.75. Step 3: Tuesday earnings = 7 × $12.50 = $87.50. Step 4: Total earnings = $43.75 + $87.50 = $131.25. Step 5: After transport = $131.25 − $28.40 = $102.85.

Correct answer: $102.85

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