- A10.66
- B11.2
- C10.2
- D11.6
Step-by-Step Solution
Write 3.6 as 3.60 so the points line up: 4.75 + 3.60 = 8.35, and 8.35 + 2.85 = 11.20 = 11.2 km. Reading 3.6 as 3.06 (padding on the wrong side) gives 10.66.
Answer: B) 11.2
Ramesh cycles 4.75 km to the market, then 3.6 km to his uncle's house, and finally 2.85 km back home. What total distance (in km) does he cover?
Class 7Fractions and DecimalsFractions and Decimals
Key idea: Multiplying decimals
Step 1: ignore the decimal points and multiply as whole numbers. Step 2: in the answer, place the decimal point so the **total decimal places equals the sum of the decimal places in the two factors**.
Example: . Whole-number multiply: . Total decimal places: 1 + 1 = 2. Place decimal: 0.24.
Example: . Decimal places: 2 + 1 = 3. Place: 0.375.
Example: . Whole-number multiply: . Total decimal places: 1 + 1 = 2. Place decimal: 0.24.
Example: . Decimal places: 2 + 1 = 3. Place: 0.375.
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