Arithmetic- Estimation and Rounding Flashcards by angel Nix

Q

Estimate the product of 47 and 22.

A

~1,000 (50 * 20)

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Q

Round 4,582 to the nearest hundred.

A

4,600

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Q

Estimate the total cost: 3 items at $12.95 each.

A

~$39 (13 * 3)

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Q

Round 0.847 to the nearest tenth.

A

0.8

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Q

Estimate 432 / 68.

A

~6 (420 / 70)

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Q

Round 15.49 to the nearest whole number.

A

15

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Q

Estimate the sum of 124, 389, and 511.

A

~1,000 (100 + 400 + 500)

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Q

Round 9,999 to the nearest thousand.

A

10,000

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Q

Estimate 15% of $78.00.

A

~$12 (10% = 7.80, 5% = 3.90; 7.80 + 3.90 = 11.70 -> 12)

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Q

Round 0.0063 to the nearest thousandth.

A

0.006

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Q

Estimate the square root of 83.

A

~9 (Since 9^2 = 81)

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Q

Round $125.50 to the nearest dollar.

A

$126

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Q

Estimate 812 * 0.48.

A

~400 (800 * 0.5)

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Q

Round 2/7 to the nearest half.

A

0 (2/7 is closer to 0 than 3.5/7)

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Q

Estimate the tip: 20% on a $54.20 bill.

A

~$11 (5.50 * 2)

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Q

Round 45.678 to two decimal places.

A

45.68

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Q

Estimate the difference: 912 - 487.

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A

~400 (900 - 500)

Q

Round 123.45 to the tens place.

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A

120

Q

Estimate 49% of 242.

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A

~120 (50% of 240)

Q

Round 3.14159 to the nearest hundredth.

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A

3.14

Q

Estimate 1,440 / 12.2.

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A

~120 (1,440 / 12)

Q

Round 85% to the nearest tenth (in decimal form).

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A

0.9 (0.85 rounds up)

Q

Estimate the perimeter of a room 12.1ft by 14.9ft.

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A

~54ft (2 * (12+15))

Q

Round 6,245 to the nearest thousand.

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A

6,000

Estimate the cost of 5.8 lbs of meat at $4.95/lb.

~$30 (6 * 5)

Round 0.995 to the nearest hundredth.

1.00

Estimate 7,100 / 89.

~80 (7,200 / 90)

Round 14,500 to the nearest thousand.

15,000

Estimate the area of a circle with radius 9.8 (Use pi approx 3).

~300 (3 * 10^2)

Round 0.042 to the nearest tenth.

0.0

Estimate the volume of a box: 3.1 x 4.9 x 2.2.

~30 (3 * 5 * 2)

Round 5/9 to the nearest whole number.

1

Estimate 24 * 31 * 9.

~6,750 (25 * 30 * 9)

Round 1.444 to the nearest tenth.

1.4

Estimate how many 19-cent stamps you can buy with $10.

~50 ($10.00 / 0.20)

Round 9.5 to the nearest whole number.

10

Estimate the quotient of 558 and 19.

~28 (560 / 20)

Round 0.333 to the nearest percent.

33%

Estimate the price after a 30% discount on $89.

~$63 (90 - 27)

Round 1,234,567 to the nearest million.

1,000,000