Mental Maths Test Year 4 Worksheets - Free Printable

Let's solve each question on the Mental Maths Sheet 4:7 step by step and explain the reasoning.

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1) 4 × 7

Answer: 28
Explanation: Multiply 4 by 7:
4 × 7 = 28

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2) How many cm in a quarter of a metre?

Answer: 25 cm
Explanation:
1 metre = 100 cm
A quarter of a metre = 100 ÷ 4 = 25 cm

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3) Find the area of this rectangle.

Dimensions: 7 cm (length), 2 cm (width)
Answer: 14 cm²
Explanation:
Area of a rectangle = length × width
= 7 × 2 = 14 cm²

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4) What is ¼ of 20?

Answer: 5
Explanation:
Divide 20 by 4:
20 ÷ 4 = 5

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5) I buy 2 packs of M&Ms for £2.10. How much did one pack cost?

Answer: £1.05
Explanation:
Total cost = £2.10
Number of packs = 2
Cost per pack = £2.10 ÷ 2 = £1.05

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6) What is the time in digital?

Clock shows:
- Hour hand between 9 and 10 → it's 9:something
- Minute hand pointing at 4 → 4 × 5 = 20 minutes
So, time is 9:20
Answer: 9:20
Explanation: On an analog clock, the minute hand at 4 means 20 minutes past the hour.

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7) What is the missing number in this sequence?

Sequence: 37, ___, 45, 49, 53, 57
Answer: 41
Explanation:
Look at the pattern:
37 → ? → 45 → 49 → 53 → 57
Differences:
45 - 37 = 8 → so if it increases by 4 each time:
37 + 4 = 41
41 + 4 = 45
45 + 4 = 49
... etc.
So the missing number is 41

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8) Write down three thousand two hundred and thirty-seven.

Answer: 3237
Explanation:
"Three thousand" = 3000
"Two hundred" = 200
"Thirty-seven" = 37
Add them: 3000 + 200 + 37 = 3237

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9) Adam is 3 years older than Ben. Ben is 5 years younger than Cate. If Cate is 12, how old is Adam?

Answer: 10
Explanation:
Cate = 12
Ben is 5 years younger than Cate → Ben = 12 - 5 = 7
Adam is 3 years older than Ben → Adam = 7 + 3 = 10

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10) I have £2. I spend 83p. How much do I have left?

Answer: 117p or £1.17
Explanation:
Convert £2 to pence: £2 = 200p
Subtract: 200p - 83p = 117p
Convert back: 117p = £1.17

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11) Round 6258 to the nearest 1000.

Answer: 6000
Explanation:
Look at the hundreds digit: 2 (in 6258)
Since 2 < 5, we round down → 6000

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12) 0.8 + ___ = 1

Answer: 0.2
Explanation:
1 - 0.8 = 0.2
So, 0.8 + 0.2 = 1

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13) Convert the Roman numerals XVI into a number.

Answer: 16
Explanation:
X = 10, V = 5, I = 1
XVI = 10 + 5 + 1 = 16

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14) 5 × 4 = ___ + 8

Answer: 12
Explanation:
Left side: 5 × 4 = 20
So: 20 = ? + 8
→ ? = 20 - 8 = 12

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15) On a winter’s day, the temperature is 4°C. It falls by 6°C. What is the temperature now?

Answer: -2°C
Explanation:
Start: 4°C
Fall by 6°C → 4 - 6 = -2°C

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16) A plane leaves Texas. It arrives in London 10 hours later at 7:20pm. What time did it leave Texas?

Answer: 9:20am
Explanation:
Arrival time: 7:20 pm
Flight duration: 10 hours
Go backwards:
7:20 pm – 10 hours =
7:20 pm – 7 hours = 12:20 pm
12:20 pm – 3 hours = 9:20 am
So, it left Texas at 9:20am

> Note: This assumes no time zone differences. In reality, London is ahead of Texas by about 5–6 hours, but since the problem doesn't mention time zones, we assume same time zone for simplicity.

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✔ Final Answers Summary:

| Q | Answer |
|---|--------------|
| 1 | 28 |
| 2 | 25 cm |
| 3 | 14 cm² |
| 4 | 5 |
| 5 | £1.05 |
| 6 | 9:20 |
| 7 | 41 |
| 8 | 3237 |
| 9 | 10 |
|10 | £1.17 |
|11 | 6000 |
|12 | 0.2 |
|13 | 16 |
|14 | 12 |
|15 | -2°C |
|16 | 9:20am |

Let me know if you'd like a printable version or explanation for any specific question!