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Class 6 Decimals — practice questions with answers

Decimals · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.

1. What is the place value of the 4 in 23.475?
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Answer: B) Tenths
Right after the decimal point comes the tenths place. The 4 sits there.
2. Compute: 15.6 + 8.45
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Answer: A) 24.05
Pad: 15.60 + 8.45. Add the hundredths, tenths, ones, tens: 15.60 + 8.45 = 24.05.
3. Which of these is NOT equal to 0.75?
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Answer: A)
0.75 = = 0.750. But = 1.4, which is not 0.75. So is the odd one out.
4. The stretch from 0.6 to 0.7 on a number line is split into 10 equal parts. What value sits on the 3rd mark after 0.6?
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Answer: D) 0.63
The gap from 0.6 to 0.7 is 0.1, so ten equal parts make each step 0.01. Three steps past 0.6 is 0.60 + 0.03 = 0.63. Adding 0.3 instead of 0.03 gives 0.9, which lands right outside the stretch.
5. A rain gauge recorded 3.6 mm of rain on Monday, 0.85 mm on Tuesday and none on Wednesday. By Thursday evening the four-day total stood at 7.5 mm. How much rain fell on Thursday?
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Answer: C) 3.05 mm
Rain up to Wednesday = 3.60 + 0.85 + 0.00 = 4.45 mm. Thursday’s rain = 7.50 − 4.45 = 3.05 mm. Check: 4.45 + 3.05 = 7.50. Adding all three given figures instead of subtracting gives 11.95 mm.
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