Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Jessica packed 38 oranges and 96 apples for the class picnic. Use mental math to find
how many pieces of fruit she packed. a. | 108 pieces of fruit | c. | 58 pieces of fruit | b. | 124 pieces of
fruit | d. | 134 pieces of
fruit | | | | |
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2.
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To
add 119 + 15 using mental math, Lia added 120 + 15 and got 135. What should she do
next? a. | Add 135 +
5. | c. | Subtract 135 +
1. | b. | Add 135 –
5. | d. | Subtract 135
– 1. | | | | |
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3.
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To
add 819 + 78 using mental math, Ali added 819 + 1 and got 820. What should he do
next? a. | Add 820 +
2. | c. | Subtract 820
– 2. | b. | Add 820 + 77. | d. | Subtract 820 – 77. | | | | |
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4.
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Mrs.
Jones was born in 1908. This was the year that Henry Ford introduced the Model T car which sold for
$850. In what year was Mrs. Jones 93 years old? Use mental math to solve.
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5.
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Add
mentally. 14 + 29
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6.
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To
subtract 212 – 67 using mental math, Heath subtracted 212 – 70 and got 142. What should he
do next? a. | Add 142 +
7. | c. | Subtract 142
– 3. | b. | Subtract 142 – 7. | d. | Add 142 + 3. | | | | |
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7.
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To
subtract 62 – 51 using mental math, Shainia subtracted 62 – 50 and got 12. What
should she do next? a. | Add 12 + 8. | c. | Subtract 12 – 8. | b. | Subtract 12
– 1. | d. | Add 12 +
1. | | | | |
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8.
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For
the winter choral concert, 298 seats were filled in the McDermott auditorium. The auditorium seats
400. Use mental math to find how many seats were empty. a. | 102
seats | c. | 202
seats | b. | 192 seats | d. | 92 seats | | | | |
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9.
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Jana
found 65 shells on the beach on Monday. On Tuesday, Jana found 104 shells. Use mental math to find
how many more shells Jana found on Tuesday than on Monday. a. | 49
shells | c. | 35
shells | b. | 41 shells | d. | 39 shells | | | | |
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10.
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Subtract using mental math. Use compensation.
778 –
397
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11.
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Which
is the best estimate for 3,963 + 3,473? a. | 8,000 | c. | 6,000 | b. | 7,000 | d. | 5,000 | | | | |
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12.
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Which
is the best estimate of the difference?
a. | 11,000 | c. | 13,000 | b. | 12,000 | d. | 28,000 | | | | |
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13.
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Cindi
estimated 2,653 + 2,973 using front-end estimation. What did she add? a. | 2,000 +
2,000 | c. | 2,000 +
1,000 | b. | 3,000 + 3,000 | d. | 2,000 + 3,000 | | | | |
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14.
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In
1690, a scientist suggested for the first time that light was wave-like. In 1958, scientists invented
the first of various forms of lasers. To the nearest hundred years, which is the best estimate of the
number years between these two events? a. | 500 years | b. | 400 years | c. | 300 years | d. | 200 years | | | | | | | | |
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15.
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In
1609, the Italian scientist Galileo made the first telescope. In 1990, astronauts on the space
shuttle placed the Hubble Telescope into orbit around the Earth. To the nearest hundred years, which
is the best estimate of the number years between these two events? a. | 500
years | b. | 400
years | c. | 300
years | d. | 200
years | | | | | | | | |
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16.
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ESTIMATE by rounding to the nearest hundred.
884 –
614
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17.
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ESTIMATE 689 + 665 by rounding to the nearest hundred. Is your estimate an
overestimate or an underestimate? a. | 1,400, underestimate | c. | 1,200, overestimate | b. | 1,500,
underestimate | d. | 1,400,
overestimate | | | | |
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18.
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ESTIMATE 641 – 475 by rounding to the nearest hundred. Is your estimate an
overestimate or an underestimate? a. | 300, underestimate | c. | 100, underestimate | b. | 100,
overestimate | d. | 200,
underestimate | | | | |
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19.
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Overestimate 8,822 – 4,284 by first rounding to the nearest
thousand. a. | 5,000 | b. | 4,000 | c. | 3,000 | d. | 2,000 | | | | | | | | |
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20.
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COMPARING POPULATIONS | Country | Population for each Square
Mile | France | 283 | India | 898 | Jamaica | 638 | Poland | 329 | United States | 79 | | |
Use the table above. Estimate how many more people
there are in each square mile in India than in Jamaica. Is your estimate an overestimate or an
underestimate? a. | 300,
overestimate | c. | 300,
underestimate | b. | 900, underestimate | d. | 200, overestimate | | | | |
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21.
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Maria
wants to buy a CD Player which costs $125. She had saved $72 and then received $43 for her birthday.
ESTIMATE the amount of money Maria has. Is your estimate an overestimate or an
underestimate? a. | $240,
overestimate | c. | $110,
underestimate | b. | $120, underestimate | d. | $100, overestimate | | | | |
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