Grade 4 Mental Maths worksheet with daily exercises for Monday, Tuesday, Wednesday, and Thursday.
Grade 4 Mental Maths worksheet with four columns for Monday, Tuesday, Wednesday, and Thursday, each containing math problems including multiplication, division, time calculations, fractions, rounding, and measurement conversions.
PNG
1124×780
157.3 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #541536
⭐
Show Answer Key & Explanations
Step-by-step solution for: Grade 4 Free Math Worksheets - Printable Worksheets
▼
Show Answer Key & Explanations
Step-by-step solution for: Grade 4 Free Math Worksheets - Printable Worksheets
Here are the solutions for the mental math problems, broken down by day.
1. 8 × 12: Think of $8 \times 10 = 80$ and $8 \times 2 = 16$. Add them: $80 + 16 = 96$.
2. 54 9: From multiplication tables, we know $9 \times 6 = 54$. So, $54 \div 9 = 6$.
3. 112 + 72: Add hundreds ($100$), then tens ($10+70=80$), then ones ($2+2=4$). Total: $184$.
4. 86 - 32: Subtract tens ($80-30=50$) and ones ($6-2=4$). Total: $54$.
5. Time: Start at 3:15 pm. Add 60 minutes to get to 4:15 pm. You have 10 minutes left ($70 - 60 = 10$). Add 10 minutes to 4:15 pm to get 4:25 pm.
6. $\frac{2}{5}$ of 30: First find $\frac{1}{5}$ of 30 by dividing by 5 ($30 \div 5 = 6$). Then multiply by 2 ($6 \times 2 = 12$).
7. Fraction shaded: The shape has 8 equal squares total. 1 square is shaded. The fraction is $\frac{1}{8}$.
8. Round 450: Look at the tens digit (5). Since it is 5 or more, round up to the next hundred. Answer: 500.
9. cm in 5m: There are 100 cm in 1 meter. $5 \times 100 = 500$. Answer: 500 cm.
10. Pattern: The numbers go up by 20 each time ($5+20=25$, $25+20=45$). Next is $45 + 20 = 65$.
1. 5 × 11: Any number times 11 is just that number twice (for single digits). $5 \times 10 = 50$, plus one more 5 is 55.
2. 96 ÷ 12: Count by 12s: 12, 24, 36, 48, 60, 72, 84, 96. That is 8 steps. Answer: 8.
3. 145 + 62: $145 + 60 = 205$. $205 + 2 = 207$.
4. 240 - 110: $240 - 100 = 140$. $140 - 10 = 130$.
5. Time: Start at 2:15 am. Add 60 minutes to get to 3:15 am. You have 20 minutes left ($80 - 60 = 20$). Add 20 minutes to 3:15 am to get 3:35 am.
6. $\frac{2}{8}$ of 16: First find $\frac{1}{8}$ of 16 ($16 \div 8 = 2$). Then multiply by 2 ($2 \times 2 = 4$).
7. Fraction shaded: The shape has 8 equal squares total. 3 squares are shaded. The fraction is $\frac{3}{8}$.
8. Round 720: Look at the tens digit (2). Since it is less than 5, round down. Answer: 700.
9. cm in 2.2m: $1 \text{ m} = 100 \text{ cm}$. $2 \text{ m} = 200 \text{ cm}$. $0.2 \text{ m}$ is $20 \text{ cm}$. Total: $200 + 20 = 220$. Answer: 220 cm.
10. Pattern: The numbers go down by 0.4 each time ($4.5 - 0.4 = 4.1$, $4.1 - 0.4 = 3.7$). Next is $3.7 - 0.4 = 3.3$.
1. 9 × 7: From multiplication tables, $9 \times 7 = 63$.
2. 28 ÷ 4: From multiplication tables, $4 \times 7 = 28$. So, $28 \div 4 = 7$.
3. 96 + 96: This is double 96. $90 + 90 = 180$. $6 + 6 = 12$. $180 + 12 = 192$.
4. 91 - 60: Just subtract the tens. $91 - 60 = 31$.
5. Time: Start at 4:20 pm. Add 40 minutes to get to 5:00 pm. You have 15 minutes left ($55 - 40 = 15$). Add 15 minutes to 5:00 pm to get 5:15 pm.
6. $\frac{1}{5}$ of 60: Divide 60 by 5. $60 \div 5 = 12$.
7. Fraction shaded: The shape has 8 equal squares total. 5 squares are shaded. The fraction is $\frac{5}{8}$.
8. Round 3,120: Look at the tens digit (2). Since it is less than 5, round down. Answer: 3,100.
9. m in 200cm: There are 100 cm in 1 meter. $200 \div 100 = 2$. Answer: 2 m.
10. Pattern: The numbers go down by 2 each time ($99, 97, 95$). Next is $95 - 2 = 93$.
1. 8 × 6: From multiplication tables, $8 \times 6 = 48$.
2. 49 ÷ 7: From multiplication tables, $7 \times 7 = 49$. So, $49 \div 7 = 7$.
3. 45 + 47: $40 + 40 = 80$. $5 + 7 = 12$. $80 + 12 = 92$.
4. 365 - 125: $365 - 100 = 265$. $265 - 25 = 240$.
5. Time: Start at 1:50 am. Add 10 minutes to get to 2:00 am. You have 30 minutes left ($40 - 10 = 30$). Add 30 minutes to 2:00 am to get 2:30 am.
6. $\frac{3}{4}$ of 24: First find $\frac{1}{4}$ of 24 ($24 \div 4 = 6$). Then multiply by 3 ($6 \times 3 = 18$).
7. Fraction shaded: The shape has 8 equal squares total. 3 squares are shaded. The fraction is $\frac{3}{8}$.
8. Round 2,850: Look at the tens digit (5). Since it is 5 or more, round up. Answer: 2,900.
9. m in 450cm: $400 \text{ cm} = 4 \text{ m}$. $50 \text{ cm} = 0.5 \text{ m}$. Total: 4.5 m.
10. Pattern: The numbers go up by 0.2 each time ($0.3, 0.5, 0.7$). Next is $0.7 + 0.2 = 0.9$.
Final Answer:
Monday:
1. 96
2. 6
3. 184
4. 54
5. 4:25pm
6. 12
7. 1/8
8. 500
9. 500
10. 65
Tuesday:
1. 55
2. 8
3. 207
4. 130
5. 3:35am
6. 4
7. 3/8
8. 700
9. 220
10. 3.3
Wednesday:
1. 63
2. 7
3. 192
4. 31
5. 5:15pm
6. 12
7. 5/8
8. 3,100
9. 2
10. 93
Thursday:
1. 48
2. 7
3. 92
4. 240
5. 2:30am
6. 18
7. 3/8
8. 2,900
9. 4.5
10. 0.9
Monday
1. 8 × 12: Think of $8 \times 10 = 80$ and $8 \times 2 = 16$. Add them: $80 + 16 = 96$.
2. 54 9: From multiplication tables, we know $9 \times 6 = 54$. So, $54 \div 9 = 6$.
3. 112 + 72: Add hundreds ($100$), then tens ($10+70=80$), then ones ($2+2=4$). Total: $184$.
4. 86 - 32: Subtract tens ($80-30=50$) and ones ($6-2=4$). Total: $54$.
5. Time: Start at 3:15 pm. Add 60 minutes to get to 4:15 pm. You have 10 minutes left ($70 - 60 = 10$). Add 10 minutes to 4:15 pm to get 4:25 pm.
6. $\frac{2}{5}$ of 30: First find $\frac{1}{5}$ of 30 by dividing by 5 ($30 \div 5 = 6$). Then multiply by 2 ($6 \times 2 = 12$).
7. Fraction shaded: The shape has 8 equal squares total. 1 square is shaded. The fraction is $\frac{1}{8}$.
8. Round 450: Look at the tens digit (5). Since it is 5 or more, round up to the next hundred. Answer: 500.
9. cm in 5m: There are 100 cm in 1 meter. $5 \times 100 = 500$. Answer: 500 cm.
10. Pattern: The numbers go up by 20 each time ($5+20=25$, $25+20=45$). Next is $45 + 20 = 65$.
Tuesday
1. 5 × 11: Any number times 11 is just that number twice (for single digits). $5 \times 10 = 50$, plus one more 5 is 55.
2. 96 ÷ 12: Count by 12s: 12, 24, 36, 48, 60, 72, 84, 96. That is 8 steps. Answer: 8.
3. 145 + 62: $145 + 60 = 205$. $205 + 2 = 207$.
4. 240 - 110: $240 - 100 = 140$. $140 - 10 = 130$.
5. Time: Start at 2:15 am. Add 60 minutes to get to 3:15 am. You have 20 minutes left ($80 - 60 = 20$). Add 20 minutes to 3:15 am to get 3:35 am.
6. $\frac{2}{8}$ of 16: First find $\frac{1}{8}$ of 16 ($16 \div 8 = 2$). Then multiply by 2 ($2 \times 2 = 4$).
7. Fraction shaded: The shape has 8 equal squares total. 3 squares are shaded. The fraction is $\frac{3}{8}$.
8. Round 720: Look at the tens digit (2). Since it is less than 5, round down. Answer: 700.
9. cm in 2.2m: $1 \text{ m} = 100 \text{ cm}$. $2 \text{ m} = 200 \text{ cm}$. $0.2 \text{ m}$ is $20 \text{ cm}$. Total: $200 + 20 = 220$. Answer: 220 cm.
10. Pattern: The numbers go down by 0.4 each time ($4.5 - 0.4 = 4.1$, $4.1 - 0.4 = 3.7$). Next is $3.7 - 0.4 = 3.3$.
Wednesday
1. 9 × 7: From multiplication tables, $9 \times 7 = 63$.
2. 28 ÷ 4: From multiplication tables, $4 \times 7 = 28$. So, $28 \div 4 = 7$.
3. 96 + 96: This is double 96. $90 + 90 = 180$. $6 + 6 = 12$. $180 + 12 = 192$.
4. 91 - 60: Just subtract the tens. $91 - 60 = 31$.
5. Time: Start at 4:20 pm. Add 40 minutes to get to 5:00 pm. You have 15 minutes left ($55 - 40 = 15$). Add 15 minutes to 5:00 pm to get 5:15 pm.
6. $\frac{1}{5}$ of 60: Divide 60 by 5. $60 \div 5 = 12$.
7. Fraction shaded: The shape has 8 equal squares total. 5 squares are shaded. The fraction is $\frac{5}{8}$.
8. Round 3,120: Look at the tens digit (2). Since it is less than 5, round down. Answer: 3,100.
9. m in 200cm: There are 100 cm in 1 meter. $200 \div 100 = 2$. Answer: 2 m.
10. Pattern: The numbers go down by 2 each time ($99, 97, 95$). Next is $95 - 2 = 93$.
Thursday
1. 8 × 6: From multiplication tables, $8 \times 6 = 48$.
2. 49 ÷ 7: From multiplication tables, $7 \times 7 = 49$. So, $49 \div 7 = 7$.
3. 45 + 47: $40 + 40 = 80$. $5 + 7 = 12$. $80 + 12 = 92$.
4. 365 - 125: $365 - 100 = 265$. $265 - 25 = 240$.
5. Time: Start at 1:50 am. Add 10 minutes to get to 2:00 am. You have 30 minutes left ($40 - 10 = 30$). Add 30 minutes to 2:00 am to get 2:30 am.
6. $\frac{3}{4}$ of 24: First find $\frac{1}{4}$ of 24 ($24 \div 4 = 6$). Then multiply by 3 ($6 \times 3 = 18$).
7. Fraction shaded: The shape has 8 equal squares total. 3 squares are shaded. The fraction is $\frac{3}{8}$.
8. Round 2,850: Look at the tens digit (5). Since it is 5 or more, round up. Answer: 2,900.
9. m in 450cm: $400 \text{ cm} = 4 \text{ m}$. $50 \text{ cm} = 0.5 \text{ m}$. Total: 4.5 m.
10. Pattern: The numbers go up by 0.2 each time ($0.3, 0.5, 0.7$). Next is $0.7 + 0.2 = 0.9$.
Final Answer:
Monday:
1. 96
2. 6
3. 184
4. 54
5. 4:25pm
6. 12
7. 1/8
8. 500
9. 500
10. 65
Tuesday:
1. 55
2. 8
3. 207
4. 130
5. 3:35am
6. 4
7. 3/8
8. 700
9. 220
10. 3.3
Wednesday:
1. 63
2. 7
3. 192
4. 31
5. 5:15pm
6. 12
7. 5/8
8. 3,100
9. 2
10. 93
Thursday:
1. 48
2. 7
3. 92
4. 240
5. 2:30am
6. 18
7. 3/8
8. 2,900
9. 4.5
10. 0.9
Parent Tip: Review the logic above to help your child master the concept of 4th math worksheet.
