Grade 5 Mental Maths worksheet with daily math exercises for Monday through Thursday.

Here is the complete solution for the Grade 5 Mental Maths worksheet, day by day, with clear explanations for each problem.

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## 🟦 Monday

1. 60 × 4 = 240
→ 6 × 4 = 24, add a zero → 240

2. 630 ÷ 9 = 70
→ 9 × 70 = 630

3. 254 + 254 = 508
→ Double 254: 250+250=500, 4+4=8 → 508

4. 460 – 125 = 335
→ 460 – 100 = 360; 360 – 25 = 335

5. Area of 15m × 10m = 150 m²
→ Area = length × width → 15 × 10 = 150

6. 9/10 – 8/10 = 1/10
→ Subtract numerators: 9–8=1, denominator stays 10

7. 4² = 16
→ 4 × 4 = 16

8. 45cm = 0.45 m
→ 1 m = 100 cm → 45 ÷ 100 = 0.45

9. Order decimals ascending: 3.2, 7.02, 7.22, 7.32
→ Smallest to largest: 3.2 (whole number part smallest), then 7.02, 7.22, 7.32

10. Fill in missing operation: 11 ___ 11 = 121 → ×
→ 11 × 11 = 121

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## 🟩 Tuesday

1. 80 × 7 = 560
→ 8 × 7 = 56, add a zero → 560

2. 320 ÷ 8 = 40
→ 8 × 40 = 320

3. 188 + 122 = 310
→ 188 + 100 = 288; 288 + 22 = 310
OR: 180+120=300, 8+2=10 → 310

4. 635 – 124 = 511
→ 635 – 100 = 535; 535 – 24 = 511

5. Area of 9m × 50m = 450 m²
→ 9 × 50 = 450

6. 2/3 – 1/3 = 1/3
→ Subtract numerators: 2–1=1, denominator 3

7. 8² = 64
→ 8 × 8 = 64

8. 5.3m = 530 cm
→ 1 m = 100 cm → 5.3 × 100 = 530

9. Order decimals descending: 1.1, 0.11, 0.1, 0.01̅
→ Largest to smallest: 1.1 > 0.11 > 0.1 > 0.01̅ (note: 0.01̅ means 0.0111..., which is slightly more than 0.01 but less than 0.1)

*Clarification*: If "0.01̅" means repeating 1 (i.e., 0.0111...), then:
- 1.1
- 0.11
- 0.1
- 0.0111... → so order is correct as above.

10. Fill in missing operation: 82 ___ 94 = 176 → +
→ 82 + 94 = 176

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## 🟨 Wednesday

1. 30 × 9 = 270
→ 3 × 9 = 27, add a zero → 270

2. 900 ÷ 9 = 100
→ 9 × 100 = 900

3. 361 + 210 = 571
→ 361 + 200 = 561; 561 + 10 = 571

4. 78 – 34 = 44
→ 78 – 30 = 48; 48 – 4 = 44

5. Area of 23m × 20m = 460 m²
→ 23 × 20 = 460

6. 5/6 – 4/6 = 1/6
→ Subtract numerators: 5–4=1, denominator 6

7. 9² = 81
→ 9 × 9 = 81

8. 632cm = 6.32 m
→ 632 ÷ 100 = 6.32

9. Order decimals ascending: 3.03, 3.06, 3.3, 3.6
→ Compare tenths and hundredths:
3.03 < 3.06 < 3.30 < 3.60

10. Fill in missing operation: 42 ___ 18 = 24 → –
→ 42 – 18 = 24

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## 🟪 Thursday

1. 40 × 10 = 400
→ Multiply by 10 → add a zero → 400

2. 160 ÷ 4 = 40
→ 4 × 40 = 160

3. 99 + 79 = 178
→ 100 + 79 = 179; subtract 1 → 178
OR: 99 + 80 = 179 – 1 = 178

4. 512 – 108 = 404
→ 512 – 100 = 412; 412 – 8 = 404

5. Area of 11m × 10m = 110 m²
→ 11 × 10 = 110

6. 3/7 – 2/7 = 1/7
→ Subtract numerators: 3–2=1, denominator 7

7. 11² = 121
→ 11 × 11 = 121

8. 0.45m = 45 cm
→ 0.45 × 100 = 45

9. Order decimals descending: 2.51, 2.15, 2.1, 2.01
→ Largest to smallest:
2.51 > 2.15 > 2.10 > 2.01

10. Fill in missing operation: 360 ___ 6 = 60 → ÷
→ 360 ÷ 6 = 60

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## ✔ Final Answer Summary:

Monday

1. 240
2. 70
3. 508
4. 335
5. 150 m²
6. 1/10
7. 16
8. 0.45
9. 3.2, 7.02, 7.22, 7.32
10. ×

Tuesday

1. 560
2. 40
3. 310
4. 511
5. 450 m²
6. 1/3
7. 64
8. 530
9. 1.1, 0.11, 0.1, 0.01̅
10. +

Wednesday

1. 270
2. 100
3. 571
4. 44
5. 460 m²
6. 1/6
7. 81
8. 6.32
9. 3.03, 3.06, 3.3, 3.6
10. –

Thursday

1. 400
2. 40
3. 178
4. 404
5. 110 m²
6. 1/7
7. 121
8. 45
9. 2.51, 2.15, 2.1, 2.01
10. ÷

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