8.NS.A.2 math practice. Learn by doing.

8.NS.A.2 practice covers use rational approximations of irrational numbers to compare their size and locate them approximately on a number line diagram. Work through 8 free questions with answers and explanations, then continue in the related math games.

Grade 81 mapped skills
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Skills aligned to 8.NS.A.2

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8 free questions · 0/0 correct

Practice playeasy

27\sqrt{27} lies between two consecutive integers. Enter the larger one.

52=25<27<36=625^2 = 25 < 27 < 36 = 6^2, so 27\sqrt{27} is between 55 and 66; the larger is 66.

Practice playeasy

What integer is closest to 120\sqrt{120}?

112=12111^2 = 121 sits right above 120120 and 12010.95\sqrt{120} \approx 10.95, so the closest integer is 1111.

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What is the integer part of 10+2\sqrt{10} + 2?

103.16\sqrt{10} \approx 3.16, so 10+25.16\sqrt{10} + 2 \approx 5.16; the integer part is 55.

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Which is closest to π\pi?

π3.14159\pi \approx 3.14159.

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Which is closest to 2\sqrt{2}?

21.414\sqrt{2} \approx 1.414.

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Which is closest to 3\sqrt{3}?

31.732\sqrt{3} \approx 1.732.

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Which is closest to 5\sqrt{5}?

52.236\sqrt{5} \approx 2.236.

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40\sqrt{40} is between two consecutive integers. Enter the smaller one.

62=36<40<49=726^2 = 36 < 40 < 49 = 7^2, so 40\sqrt{40} is between 66 and 77; the smaller is 66.

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