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Name:    Unit 2 Part A

Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
A B C D	1.	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
A B C D	2.	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.
A B C D	3.	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.
A B C D	4.	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. a. 1917 b. 1991 c. 2001 d. 2003
A B C D	5.	Add mentally.14 + 29 a. 43 b. 24 c. 33 d. 20
A B C D	6.	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.
A B C D	7.	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.
A B C D	8.	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
A B C D	9.	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
A B C D	10.	Subtract using mental math. Use compensation. 778 – 397 a. 375 c. 78 b. 178 d. 381
A B C D	11.	Which is the best estimate for 3,963 + 3,473? a. 8,000 c. 6,000 b. 7,000 d. 5,000
A B C D	12.	Which is the best estimate of the difference? a. 11,000 c. 13,000 b. 12,000 d. 28,000
A B C D	13.	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
A B C D	14.	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
A B C D	15.	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
A B C D	16.	ESTIMATE by rounding to the nearest hundred. 884 – 614 a. 600 b. 500 c. 400 d. 300
A B C D	17.	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
A B C D	18.	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
A B C D	19.	Overestimate 8,822 – 4,284 by first rounding to the nearest thousand. a. 5,000 b. 4,000 c. 3,000 d. 2,000
A B C D	20.	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
A B C D	21.	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