Home Questions Subtraction Subtraction Questions & Answers For 8th Grade Students
Subtraction Questions & Answers For 8th Grade Students
Subtraction questions and answers suitable for 8th Grade students. The questions are Common Core aligned and follow the framework as set out. Available to see visually online. To utilise the PDF version please click the ‘Download PDF’ option.
Completely free to use and download. For more comprehensive end of 8th Grade question booklets please see our end of year test booklets.
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What is the result of subtracting √9 from √25?
Correct Answers : d)
Simplify the expression 2^5 - 2^3.
Correct Answers : d)
Subtract 5√3 from 7√3.
a) √15
Correct Answers : b)
Calculate 3.5 × 10^4 - 2.2 × 10^3 in scientific notation.
a) 3.28 × 10^4
Correct Answers : a)
If x^2 - 16 = 0, what is the value of x?
a) x = ±2
Correct Answers : c)
Sarah is working on a home improvement project and needs to cut a wooden board into two pieces. The length of the original board is √144 inches. She wants one of the pieces to be √81 inches long. How much longer does she need to cut the other piece to achieve her goal?
a) √36 inches
Correct Answers : c)
Alex is planting two different types of flowers in his garden. He has a flower bed with an area of √256 square feet, and he wants to fill half of it with red flowers. How much space in square feet will be left in the flower bed after planting the red flowers?
a) √64 square feet
Correct Answers : a)
The speed of light in a vacuum is approximately 2.998 × 10^8 meters per second. The speed of the North American X-15 aircraft is approximately 2.022 × 10^3 meters per second. How much slower is the X-15 aircraft's speed compared to the speed of light in scientific notation?
a) 2.99 × 10^8 meters per second b) 2.997 × 10^8 meters per second c) 2.99598 × 10^3 meters per second d) 2.99798 × 10^8 meters per second
Correct Answers : d)
A scientist measured the temperature change in a chemical reaction. The initial temperature was 4.56 × 10^3 Kelvin, and after the reaction, it became 3.92 × 10^3 Kelvin. What was the temperature change in standard notation?
a) 540 Kelvin b) 640 Kelvin c) 740 Kelvin d) 840 Kelvin
Correct Answers : b)
Emma and Mark are saving money for their upcoming vacation. Emma saved ＄80 each week, and Mark saved ＄60 each week. After several weeks, they compared their savings. They found that the difference in their savings was ＄200. How many weeks did they save before noticing this difference?
a) 5 weeks
Correct Answers : b)