I'll solve each of these fraction problems step by step. Let me work through them carefully.
Problem 1: 12/22 × 2/5
- Multiply numerators: 12 × 2 = 24
- Multiply denominators: 22 × 5 = 110
- Result: 24/110
- Simplify: Both divisible by 2 → 12/55
Problem 2: 16/17 ÷ 4/9
- Flip the second fraction and multiply: 16/17 × 9/4
- Multiply numerators: 16 × 9 = 144
- Multiply denominators: 17 × 4 = 68
- Result: 144/68
- Simplify: Both divisible by 4 → 36/17
Problem 3: 9/16 + 36/27
- First simplify 36/27: both divisible by 9 → 4/3
- Find common denominator for 9/16 + 4/3: LCD = 48
- Convert: 9/16 = 27/48, 4/3 = 64/48
- Add: 27/48 + 64/48 = 91/48
Problem 4: 9/34 ÷ 23/51
- Flip and multiply: 9/34 × 51/23
- Notice 51 = 3 × 17 and 34 = 2 × 17, so we can cancel 17
- 9/34 × 51/23 = 9/(2×17) × (3×17)/23 = 9/2 × 3/23 = 27/46
Problem 5: 20/3 + 24/11
- Find common denominator: LCD = 33
- Convert: 20/3 = 220/33, 24/11 = 72/33
- Add: 220/33 + 72/33 = 292/33
Problem 6: 21/26 - 1/8
- Find common denominator: LCD = 104
- Convert: 21/26 = 84/104, 1/8 = 13/104
- Subtract: 84/104 - 13/104 = 71/104
Problem 7: 17/5 × 32/6
- Simplify first: 32/6 = 16/3
- Multiply: 17/5 × 16/3 = 272/15
Problem 8: 4/15 + 9/16
- Find common denominator: LCD = 240
- Convert: 4/15 = 64/240, 9/16 = 135/240
- Add: 64/240 + 135/240 = 199/240
Problem 9: 31/6 - 8/7
- Find common denominator: LCD = 42
- Convert: 31/6 = 217/42, 8/7 = 48/42
- Subtract: 217/42 - 48/42 = 169/42
Problem 10: 11/14 - 12/26
- Simplify 12/26 = 6/13
- Find common denominator: LCD = 182
- Convert: 11/14 = 143/182, 6/13 = 84/182
- Subtract: 143/182 - 84/182 = 59/182
Problem 11: 15/16 ÷ 19/3
- Flip and multiply: 15/16 × 3/19
- Multiply: 45/304
Problem 12: 7/9 ÷ 3/16
- Flip and multiply: 7/9 × 16/3
- Multiply: 112/27
Problem 13: 15/18 × 13/22
- Simplify 15/18 = 5/6
- Multiply: 5/6 × 13/22 = 65/132
Problem 14: 12/21 ÷ 14/56
- Simplify: 12/21 = 4/7, 14/56 = 1/4
- Flip and multiply: 4/7 × 4/1 = 16/7
Final Answer:
1. 12/55
2. 36/17
3. 91/48
4. 27/46
5. 292/33
6. 71/104
7. 272/15
8. 199/240
9. 169/42
10. 59/182
11. 45/304
12. 112/27
13. 65/132
14. 16/7
Parent Tip: Review the logic above to help your child master the concept of multiply and divide fractions worksheet.