Add and subtract rational numbers
Add and subtract integers and fractions, including negative fractions, using appropriate strategies in various contexts. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
Evaluate.
12 + (−16) + 8
Answer: 4
See one solved, step by step
Compute. Give your answer as a fraction in lowest terms.
39 - 23
📘 Worked solution
139 = 39, 23 = 69The lowest common denominator of 9 and 3 is 9.
239 - 69 = −39Subtract the numerators; the denominator stays 9.
3= −13Divide top and bottom by 3 to reduce.
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