| Fractions Test 1 KEY |
Name____________________________________ |
1. Add 1/2 + 1/4
Answer: 3/4
1. Add 1/3 + 1/6
Answer: 3/6 or 1/2
1. Add 1/4 + 3/8
Answer: 5/8
1. Add 1/3 + 1/9
Answer: 4/9
2. Subtract 2/3 - 1/6
Answer: 3/6 or 1/2
2. Subtract 2/5 - 1/10
Answer: 3/10
2. Subtract 3/5 - 1/10
Answer: 5/10 or 1/2
2. Subtract 2/3 - 1/9
Answer: 5/9
3. Add 1/4 + 3/5
Answer: 17/20
3. Add 1/3 + 2/5
Answer: 11/15
3. Add 1/4 + 3/7
Answer: 19/28
3. Add 1/3 + 3/8
Answer: 17/24
4. Subtract 2/3 - 1/5
Answer: 7/15
4. Subtract 2/5 - 1/9
Answer: 13/45
4. Subtract 3/5 - 1/9
Answer: 22/45
4. Subtract 2/3 - 1/8
Answer: 13/24
5. Add 2/5 + 4/5 and write as both a fraction and mixed number.
Answer: 6/5, 1 1/5
5. Add 3/4 + 3/4 and write as both a fraction and mixed number
Answer: 6/4 or 3/2, 1 1/2
5. Add 2/7 + 6/7 and write as both a fraction and mixed number.
Answer: 8/7, 1 1/7
5. Add 5/8 + 7/8 and write as both a fraction and mixed number.
Answer: 12/8 or 3/2, 1 4/8 or 1 1/2
6. Subtract 5/8 - 3/8 and reduce the answer
Answer: 1/4
6. Subtract 7/9 - 4/9 and reduce the answer
Answer: 1/3
6. Subtract 5/16 - 1/16 and reduce the answer
Answer: 1/4
6. Subtract 5/6 - 2/6 and reduce the answer
Answer: 1/2
7. Add 3/7 + 5/9
Answer: 62/63
7. Add 4/5 + 7/8
Answer: 1 27/40 or 67/40
7. Add 2/3 + 5/11
Ansewr: 1 4/33 or 37/33
7. Add 3/4 + 5/9
Answer: 1 11/36 or 47/36
8. Subtract 5/7 - 5/9
Answer: 10/63
8. Subtract 4/5 - 3/8
Answer: 17/40
8. Subtract 3/5 - 2/7
Ansewr: 11/35
8. Subtract 5/7 - 5/8
Answer: 5/56
9. Add 5/12 + 6/20 after finding the Least Common Denominator
Answer: LCD is 60, Sum is 43/60
9. Add 4/15 + 3/20 after finding the Least Common Denominator
Answer: LCD is 60, Sum is 5/12
9. Add 7/15 + 5/18 after finding the Least Common Denominator
Answer: LCD is 90, Sum is 67/90
9. Add 7/12 + 3/20 after finding the Least Common Denominator
Answer: LCD is 60, Sum is 11/15
10. Subtract 13/20 - 5/14 after finding the Least Common Denominator
Answer: LCD is 140, Difference is 41/140
10. Subtract 11/20 - 5/14 after finding the Least Common Denominator
Answer: LCD is 140, Difference is 27/140
10. Subtract 17/20 - 5/14 after finding the Least Common Denominator
Answer: LCD is 140, Difference is 69/140
10. Subtract 9/20 - 5/14 after finding the Least Common Denominator
Answer: LCD is 140, Difference is 13/140
11. Add 1 1/3 + 1 2/9
Answer: 2 5/9
11. Add 1 1/2 + 1 3/8
Answer: 2 7/8
11. Add 1 1/5 + 1 3/10
Answer: 2 1/2 or 2 5/10
11. Add 1 1/4 + 1 5/12
Answer: 2 8/12 or 2 2/3
12. Subtract 3 1/3 - 1 2/9
Answer: 2 1/9
12. Subtract 2 1/2 - 1 3/8
Answer: 1 1/8
12. Subtract 1 4/5 - 1 3/10
Answer: 5/10 or 1/2
12. Subtract 6 1/4 - 1 1/12
Answer: 5 2/12 or 5 1/6
13. Add 1 1/12 + 3 2/14 after finding the Least Common Denominator
Answer: LCD is 84, Sum is 4 19/84
13. Add 1 1/14 + 3 3/18 after finding the Least Common Denominator
Answer: LCD is 126, Sum is 4 5/21 or 4 30/126
13. Add 1 1/15 + 1 3/12 after finding the Least Common Denominator
Answer: LCD is 60, Sum is 2 19/60
13. Add 1 1/14 + 1 5/12 after finding the Least Common Denominator
Answer: LCD is 84, Sum is 2 41/84
14. Subtract 3 1/3 - 1 7/9
Answer: 1 5/9
14. Subtract 2 1/2 - 1 5/8
Answer: 7/8
14. Subtract 6 3/5 - 1 7/10
Answer: 4 9/10
14. Subtract 6 1/4 - 1 7/12
Answer: 4 2/3 or 4 8/12
15. Add 1/2 + 1/5 + 5/6 + 2/3
Answer: 2 1/5 or 11/5 or 66/30
15. Add 2/3 + 1/7 + 5/6 + 3/4
Answer: 5 9/14 or 79/14 or 474/84
15. Add 1/2 + 2/5 + 5/8 + 2/3
Answer: 4 21/40 or 181/40 or 543/120
15. Add 1/3 + 1/5 + 5/6 + 3/4
Answer: 5 11/30 or 161/30 or 322/60
16. Add 3/10 + 1/12 + 5/14 after finding the Least Common Denominator
Answer: LCD is 420, Sum is 311/420
16. Add 3/8 + 1/12 + 5/14 after finding the Least Common Denominator
Answer: LCD is 168, Sum is 137/168
16. Add 1/4 + 1/15 + 5/21 after finding the Least Common Denominator
Answer: LCD is 420, Sum is 233/420
16. Add 4/15 + 1/12 + 5/14 after finding the Least Common Denominator
Answer: LCD is 420, Sum is 99/140 or 297/420
17. Evaluate (1/3 + 3/5) - 1/7
Answer: 83/105
17. Evaluate (1/4 + 3/5) - 1/7
Answer: 99/140
17. Evaluate (1/2 + 3/5) - 5/7
Answer: 27/70
17. Evaluate (1/3 + 3/5) - 1/7
Answer: 83/105
18. Evaluate 3/4 - (1/7 + 3/15)
Answer: 57/140 or 171/420
18. Evaluate 7/8 - (1/7 + 3/15)
Answer: 149/280 or 447/840
18. Evaluate 3/4 - (3/7 + 3/15)
Answer: 17/140 or 51/420
18. Evaluate 5/8 - (1/7 + 3/15)
Answer: 79/280 or 237/840
19. Add 1/131 + 3/111
Answer: 504/14541 or 168/4847
19. Add 3/121 + 2/117
Answer: 593/14157
19. Add 2/113 + 1/101
Answer: 315/11413
19. Add 3/111 + 1/109
Answer: 438/12099 or 146/4033
20. Subtract 3/131 - 1/111
Answer: 202/14541
20. Subtract 3/121 - 2/117
Answer: 109/14157
20. Subtract 2/113 - 1/101
Answer: 89/11413
20. Subtract 3/111 - 1/109
Answer: 216/12099 or 72/4033
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