Foundation Mathematics Primary 5 Decimals

A bag of rice costs $3.45. How much do 6 bags of rice cost?

A $18.70
B $20.30
C $20.40
D $20.70
Show Worked Solution

Worked Solution

Step 1: Multiply the whole dollars: $3 × 6 = $18. Step 2: Multiply the cents: $0.45 × 6. — 5 hundredths × 6 = 30 hundredths = $0.30 — 4 tenths × 6 = 24 tenths = $2.40 — Total cents portion: $0.30 + $2.40 = $2.70 Step 3: Add: $18 + $2.70 = $20.70. (Alternatively: 345 × 6 = 2070; place decimal to get $20.70.) Answer: $20.70

Correct answer: $20.70

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