Grade 4 Mental Maths worksheet featuring daily math exercises for Monday through Thursday, covering arithmetic, time, fractions, and measurement.

Let's solve the problems step by step for each day.

---

Monday

1. 8 × 12 =
\[
8 \times 12 = 96
\]

2. 54 ÷ 9 =
\[
54 \div 9 = 6
\]

3. 112 + 72 =
\[
112 + 72 = 184
\]

4. 86 - 32 =
\[
86 - 32 = 54
\]

5. The time is 3:15 pm. What time is it in 70 minutes?
- Start at 3:15 pm.
- Add 70 minutes:
- 60 minutes = 1 hour → 3:15 + 1 hour = 4:15 pm.
- Remaining 10 minutes → 4:15 + 10 minutes = 4:25 pm.
\[
\text{Time after 70 minutes: } 4:25 \text{ pm}
\]

6. \(\frac{2}{5}\) of 30 =
\[
\frac{2}{5} \times 30 = \frac{2 \times 30}{5} = \frac{60}{5} = 12
\]

7. What fraction of the shape is shaded?
- Total squares: 6
- Shaded squares: 2
\[
\text{Fraction shaded: } \frac{2}{6} = \frac{1}{3}
\]

8. Round to nearest 100: 100 - 450 =
- First, calculate \(100 - 450\):
\[
100 - 450 = -350
\]
- Round \(-350\) to the nearest 100:
\[
-350 \text{ rounds to } -400
\]

9. How many cm in 5m?
\[
1 \text{ m} = 100 \text{ cm} \implies 5 \text{ m} = 5 \times 100 = 500 \text{ cm}
\]

10. 5, 25, 45, ___
- The sequence increases by 20 each time:
\[
5 + 20 = 25, \quad 25 + 20 = 45, \quad 45 + 20 = 65
\]
\[
\text{Next number: } 65
\]

---

Tuesday

1. 5 × 11 =
\[
5 \times 11 = 55
\]

2. 96 ÷ 12 =
\[
96 \div 12 = 8
\]

3. 145 + 62 =
\[
145 + 62 = 207
\]

4. 240 - 110 =
\[
240 - 110 = 130
\]

5. The time is 2:15 am. What time is it in 80 minutes?
- Start at 2:15 am.
- Add 80 minutes:
- 60 minutes = 1 hour → 2:15 + 1 hour = 3:15 am.
- Remaining 20 minutes → 3:15 + 20 minutes = 3:35 am.
\[
\text{Time after 80 minutes: } 3:35 \text{ am}
\]

6. \(\frac{2}{8}\) of 16 =
\[
\frac{2}{8} \times 16 = \frac{2 \times 16}{8} = \frac{32}{8} = 4
\]

7. What fraction of the shape is shaded?
- Total squares: 6
- Shaded squares: 3
\[
\text{Fraction shaded: } \frac{3}{6} = \frac{1}{2}
\]

8. Round to nearest 100: 100 - 720 =
- First, calculate \(100 - 720\):
\[
100 - 720 = -620
\]
- Round \(-620\) to the nearest 100:
\[
-620 \text{ rounds to } -600
\]

9. How many cm in 2.2m?
\[
1 \text{ m} = 100 \text{ cm} \implies 2.2 \text{ m} = 2.2 \times 100 = 220 \text{ cm}
\]

10. 4.5, 4.1, 3.7, ___
- The sequence decreases by 0.4 each time:
\[
4.5 - 0.4 = 4.1, \quad 4.1 - 0.4 = 3.7, \quad 3.7 - 0.4 = 3.3
\]
\[
\text{Next number: } 3.3
\]

---

Wednesday

1. 9 × 7 =
\[
9 \times 7 = 63
\]

2. 28 ÷ 4 =
\[
28 \div 4 = 7
\]

3. 96 + 96 =
\[
96 + 96 = 192
\]

4. 91 - 60 =
\[
91 - 60 = 31
\]

5. The time is 4:20 pm. What time is it in 55 minutes?
- Start at 4:20 pm.
- Add 55 minutes:
- 60 minutes = 1 hour → 4:20 + 1 hour = 5:20 pm.
- Subtract 5 minutes (since we added 1 hour instead of 55 minutes) → 5:20 - 5 minutes = 5:15 pm.
\[
\text{Time after 55 minutes: } 5:15 \text{ pm}
\]

6. \(\frac{1}{5}\) of 60 =
\[
\frac{1}{5} \times 60 = \frac{60}{5} = 12
\]

7. What fraction of the shape is shaded?
- Total squares: 4
- Shaded squares: 3
\[
\text{Fraction shaded: } \frac{3}{4}
\]

8. Round to nearest 100: 100 - 3,120 =
- First, calculate \(100 - 3,120\):
\[
100 - 3,120 = -3,020
\]
- Round \(-3,020\) to the nearest 100:
\[
-3,020 \text{ rounds to } -3,000
\]

9. How many m in 200cm?
\[
100 \text{ cm} = 1 \text{ m} \implies 200 \text{ cm} = \frac{200}{100} = 2 \text{ m}
\]

10. 99, 97, 95, ___
- The sequence decreases by 2 each time:
\[
99 - 2 = 97, \quad 97 - 2 = 95, \quad 95 - 2 = 93
\]
\[
\text{Next number: } 93
\]

---

Thursday

1. 8 × 6 =
\[
8 \times 6 = 48
\]

2. 49 ÷ 7 =
\[
49 \div 7 = 7
\]

3. 45 + 47 =
\[
45 + 47 = 92
\]

4. 365 - 125 =
\[
365 - 125 = 240
\]

5. The time is 1:50 am. What time is it in 40 minutes?
- Start at 1:50 am.
- Add 40 minutes:
- 60 minutes = 1 hour → 1:50 + 1 hour = 2:50 am.
- Subtract 20 minutes (since we added 1 hour instead of 40 minutes) → 2:50 - 20 minutes = 2:30 am.
\[
\text{Time after 40 minutes: } 2:30 \text{ am}
\]

6. \(\frac{3}{4}\) of 24 =
\[
\frac{3}{4} \times 24 = \frac{3 \times 24}{4} = \frac{72}{4} = 18
\]

7. What fraction of the shape is shaded?
- Total squares: 4
- Shaded squares: 2
\[
\text{Fraction shaded: } \frac{2}{4} = \frac{1}{2}
\]

8. Round to nearest 100: 100 - 2,850 =
- First, calculate \(100 - 2,850\):
\[
100 - 2,850 = -2,750
\]
- Round \(-2,750\) to the nearest 100:
\[
-2,750 \text{ rounds to } -2,800
\]

9. How many m in 450cm?
\[
100 \text{ cm} = 1 \text{ m} \implies 450 \text{ cm} = \frac{450}{100} = 4.5 \text{ m}
\]

10. 0.3, 0.5, 0.7, ___
- The sequence increases by 0.2 each time:
\[
0.3 + 0.2 = 0.5, \quad 0.5 + 0.2 = 0.7, \quad 0.7 + 0.2 = 0.9
\]
\[
\text{Next number: } 0.9
\]

---

Final Answers

\[
\boxed{
\begin{array}{ll}
\text{Monday:} & 96, 6, 184, 54, 4:25 \text{ pm}, 12, \frac{1}{3}, -400, 500, 65 \\
\text{Tuesday:} & 55, 8, 207, 130, 3:35 \text{ am}, 4, \frac{1}{2}, -600, 220, 3.3 \\
\text{Wednesday:} & 63, 7, 192, 31, 5:15 \text{ pm}, 12, \frac{3}{4}, -3000, 2, 93 \\
\text{Thursday:} & 48, 7, 92, 240, 2:30 \text{ am}, 18, \frac{1}{2}, -2800, 4.5, 0.9 \\
\end{array}
}
\]