This challenging worksheet has students answer multiple-choice questions, and fill in blanks to practice adding and subtracting fractions with unlike denominators skills.
It includes 9 questions across 2 sections for focused practice.
Style:
Adding and Subtracting Fractions with Unlike Denominators
Part A: Multiple Choice
Circle the best answer for each question.
1. What is 323 + 258 expressed as a mixed number in simplest form?
A) 6724
B) 53124
C) 5711
D) 613
2. A student wrote: 415 − 134 = 3420 − 11520 = 2920. Which part has an error?
A) The LCD should be 9, not 20
B) 420 should be regrouped as 2420 before subtracting
C) 1520 is the wrong conversion for 34
D) No step has an error
3. What is 79 + 512 expressed in simplest form?
A) 4336
B) 1736
C) 1221
D) 43
4. To find 616 − 4710, what is the LCD and the regrouped form of 616?
A) LCD = 30, regroup as 53530
B) LCD = 60, regroup as 57060
C) LCD = 30, regroup as 6530
D) LCD = 16, regroup as 51716
Part B: Fill in the Blank
Write the correct answer on each line.
1. 514 + 323 = 5312 + 3812 = 81112 in simplest form.
2. 913 − 456 = 886 − 456 = 412 in simplest form.
3. The LCD of 4, 5, and 10 is 20.
4. 34 + 25 − 110 = 1520 + 820 − 220 = 1120 as a mixed number.
5. 1018 − 635 = 10540 − 62440 = 32140 in simplest form.
Adding and Subtracting Fractions with Unlike Denominators
★ Part A: Multiple Choice
Circle the best answer for each question.
1. What is 323 + 258 expressed as a mixed number in simplest form?
A) 6724
B) 53124
C) 5711
D) 613
2. A student wrote: 415 − 134 = 3420 − 11520 = 2920. Which part has an error?
A) The LCD should be 9, not 20
B) 420 should be regrouped as 2420 before subtracting
C) 1520 is the wrong conversion for 34
D) No step has an error
3. What is 79 + 512 expressed in simplest form?
A) 4336
B) 1736
C) 1221
D) 43
4. To find 616 − 4710, what is the LCD and the regrouped form of 616?
A) LCD = 30, regroup as 53530
B) LCD = 60, regroup as 57060
C) LCD = 30, regroup as 6530
D) LCD = 16, regroup as 51716
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) 5 1/4 + 3 2/3 = 5 3/12 + 3 8/12 = 8 11/12 in simplest form.
2) 9 1/3 − 4 5/6 = 8 8/6 − 4 5/6 = 4 1/2 in simplest form.
3) The LCD of 4, 5, and 10 is 20.
4) 3/4 + 2/5 − 1/10 = 15/20 + 8/20 − 2/20 = 1 1/20 as a mixed number.
5) 10 1/8 − 6 3/5 = 10 5/40 − 6 24/40 = 3 21/40 in simplest form.
Ready to Practice?
Complete each section carefully.
9 Questions
12-18 minutes
Auto-graded
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