Mental Maths worksheet for Grade 6 students featuring 10 problems each in addition, subtraction, multiplication, and division.

Here are the solutions to the mental math problems, broken down by category.

Add

1. $29 + 39 = 68$
2. $86 + 42 = 128$
3. $94 + 194 = 288$
4. $231 + 79 = 310$
5. $412 + 130 = 542$
6. $351 + 251 = 602$
7. $99 + 121 = 220$
8. $517 + 217 = 734$
9. $813 + 99 = 912$
10. $275 + 75 = 350$

Subtract

1. $624 - 84 = 540$
2. $120 - 65 = 55$
3. $358 - 126 = 232$
4. $836 - 95 = 741$
5. $312 - 105 = 207$
6. $87 - 32 = 55$
7. $169 - 48 = 121$
8. $254 - 89 = 165$
9. $96 - 45 = 51$
10. $326 - 83 = 243$

Multiply

1. $80 \times 30 = 2,400$
2. $50 \times 90 = 4,500$
3. $70 \times 70 = 4,900$
4. $60 \times 80 = 4,800$
5. $90 \times 80 = 7,200$
6. $300 \times 60 = 18,000$
7. $700 \times 50 = 35,000$
8. $60 \times 700 = 42,000$
9. $40 \times 900 = 36,000$
10. $20 \times 600 = 12,000$

Divide

1. $240 \div 80 = 3$
2. $280 \div 70 = 4$
3. $540 \div 60 = 9$
4. $480 \div 40 = 12$
5. $250 \div 50 = 5$
6. $360 \div 6 = 60$
7. $180 \div 3 = 60$
8. $960 \div 12 = 80$
9. $200 \div 4 = 50$
10. $240 \div 12 = 20$

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Final Answer:
Add: 1. 68, 2. 128, 3. 288, 4. 310, 5. 542, 6. 602, 7. 220, 8. 734, 9. 912, 10. 350
Subtract: 1. 540, 2. 55, 3. 232, 4. 741, 5. 207, 6. 55, 7. 121, 8. 165, 9. 51, 10. 243
Multiply: 1. 2,400, 2. 4,500, 3. 4,900, 4. 4,800, 5. 7,200, 6. 18,000, 7. 35,000, 8. 42,000, 9. 36,000, 10. 12,000
Divide: 1. 3, 2. 4, 3. 9, 4. 12, 5. 5, 6. 60, 7. 60, 8. 80, 9. 50, 10. 20