Decimals · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.
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?
- A3.95 mm
- B11.95 mm
- C3.05 mm
- D2.95 mm
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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.