Problem Explanation:
The image contains a mental math worksheet for Grade 6 students. The worksheet is divided into four sections:
Add,
Subtract,
Multiply, and
Divide. Each section has 10 problems that need to be solved mentally.
Solution Approach:
We will solve each problem step by step, ensuring clarity and accuracy.
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####
Section 1: 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. \( 275 + 75 = 350 \)
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Section 2: 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. \( 9.96 - 45 = -35.04 \) (Note: This involves decimals, so the result is negative.)
10. \( 326 - 83 = 243 \)
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####
Section 3: Multiply
1. \( 80 \times 30 = 2400 \)
2. \( 50 \times 90 = 4500 \)
3. \( 3.70 \times 70 = 259 \)
4. \( 4.60 \times 80 = 368 \)
5. \( 9.90 \times 80 = 792 \)
6. \( 300 \times 60 = 18000 \)
7. \( 7.700 \times 50 = 385 \)
8. \( 8.60 \times 700 = 6020 \)
9. \( 9.40 \times 900 = 8460 \)
10. \( 10.20 \times 600 = 6120 \)
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####
Section 4: Divide
1. \( 240 \div 80 = 3 \)
2. \( 280 \div 70 = 4 \)
3. \( 3540 \div 60 = 59 \)
4. \( 480 \div 40 = 12 \)
5. \( 5250 \div 50 = 105 \)
6. \( 6360 \div 6 = 1060 \)
7. \( 7180 \div 3 = 2393.\overline{3} \) (Repeating decimal)
8. \( 8960 \div 12 = 746.\overline{6} \) (Repeating decimal)
9. \( 9200 \div 4 = 2300 \)
10. \( 10240 \div 12 = 853.\overline{3} \) (Repeating decimal)
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Final Answers:
\[
\boxed{
\begin{array}{cccc}
\text{Add} & \text{Subtract} & \text{Multiply} & \text{Divide} \\
68 & 540 & 2400 & 3 \\
128 & 55 & 4500 & 4 \\
288 & 232 & 259 & 59 \\
310 & 741 & 368 & 12 \\
542 & 207 & 792 & 105 \\
602 & 55 & 18000 & 1060 \\
220 & 121 & 385 & 2393.\overline{3} \\
734 & 165 & 6020 & 746.\overline{6} \\
912 & -35.04 & 8460 & 2300 \\
350 & 243 & 6120 & 853.\overline{3} \\
\end{array}
}
\]
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This completes the solution. Each problem has been solved step by step, ensuring clarity and accuracy.
Parent Tip: Review the logic above to help your child master the concept of math worksheets grade 6.
