Operations with Rational Numbers
This worksheet focuses on performing operations (addition, subtraction, multiplication, division) with rational numbers for 8th-grade students.
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Operations with Rational Numbers
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Read each question carefully and perform the indicated operations with rational numbers. Show all your work.
1. The sum of two rational numbers is always a number.
2. When dividing by a fraction, you should multiply by its .
3. A rational number can be expressed as a fraction where the denominator is not .
1. Calculate: 3/4 + (-1/2)
2. Find the difference: -2/3 - 1/6
3. Evaluate: 0.75 + (-0.2)
1. Multiply: (-5/8) * (4/15)
2. Divide: (7/10) / (-14/5)
3. Evaluate: (-2.5) * (-0.4)
1. Which of the following is equivalent to 1/3 + 1/4?
1/7
2/7
7/12
5/12
2. What is the product of -0.5 and 1.2?
-0.6
0.6
-6.0
6.0
1. The reciprocal of a negative fraction is always positive.
True
False
2. The product of two rational numbers with different signs is always negative.
True
False
1. A recipe calls for 2 1/2 cups of flour. If you only want to make half of the recipe, how much flour do you need?
2. The temperature dropped from 8.5°C to -2.3°C. What was the change in temperature?