5.3B
Multiplication of 2 and 3 Digit Numbers
Multiplication of 2 and 3 Digit Numbers
Aspen added 14 to the product of 224 and 16.
What sum did Aspen find?
3,598
Mr. Márquez had 123 eggs in a refrigerator in his restaurant. He put 32 more cartons of eggs in the refrigerator. Each carton contained 18 eggs.
Which is the best estimate of the number of eggs Mr. Márquez now has?
123 + 32 x 18
100 + 30 x 20 = 700
What is 257.684 rounded to the nearest tenth?
What is 257.684 rounded to the nearest hundredth?
257.7
257.68
A chemist compares the amounts of water in two jars.
Approximately how many more milliliters of water does Jar Y contain than Jar X?
500 mL
There are 127 rows of apple trees on a farm. There are 53 apple trees in each row.
How many apple trees are on the farm altogether?
6, 731
A school library has 215 books on display. The librarian adds 27 boxes of books. Each box contains 22 books.
Which is the best estimate of the total number of books now in the library?
215 + 27×22
200 + 30×20 = 800
Imogen rounded a decimal number to the nearest tenth and got 124.6.
Write two different numbers that could have rounded to 124.6.
A 124.06
B 124.55
C 124.056
D 124.51
E 124.615
B 124.55
E 124.615
Mr. Maclane drove 577.2 miles. Ms. Lopez drove 165.4 miles.
About how many more miles did Mr. Maclane drive than Ms. Lopez?
400 miles
A flower shop employee ordered 48 cases of roses. Each case contained 144 roses.
How many roses did the employee order in all?
6, 912
A farmer already has 175 watermelons. He harvests 41 more rows with about 21 watermelons in each row.
Which is the best estimate of the total number of watermelons?
175 + 41×21
200 + 40×20 = 1,000
What is 2.938 rounded to the nearest tenth?
2.9
Shane spent $15.45 on a shirt, $21.99 on a pair of pants, and $12.15 on a hat.
What is the best estimate of the total amount of money Shane spent?
A $40
B $50
C $60
D $70
B $50
A company makes 625 cell phone cases each day. The company works for 31 days.
How many cell phone cases does the company make in 31 days?
19,375
A theater sold 312 tickets before opening day. During the next 36 days, it sold about 24 tickets each day.
Which is the best estimate of the total number of tickets sold?
312 + 36×24
300 + 40×20 = 1,100
A computer rounded the number 129.257 to the nearest hundredth.
What is the rounded number?
129.26
Paula wants to buy 3 shirts and 2 belts.
About how much more money does Paula need to buy the shirts and belts?
$24
A student multiplied 538 by the sum of 42 and 6.
What is the product?
25,824
A warehouse has 490 boxes in storage. Workers add 48 pallets, and each pallet holds 31 boxes.
Which is the best estimate of the total number of boxes now in storage?
490 + 48×31
500 + 50×30 = 2,000
A number rounded to the nearest hundredth is 384.93. The original number is greater than 384.93.
What could the original number be?
There is more than one possible answer.
384.931 (or any value greater than 384.93 and less than 384.935, exclusive0
The list shows the length of a day on two different planets.
Which statement is best supported by this information?
A. A day on Venus is about 40 times as long as a day on Neptune.
B. A day on Venus is about 400 times as long as a day on Neptune.
C. A day on Venus is about 50 times as long as a day on Neptune.
D. A day on Venus is about 500 times as long as a day on Neptune.
B. A day on Venus is about 400 times as long as a day on Neptune.
Estimation Strategy:
Then:
6,000 ÷ 15 = 400
So a day on Venus is approximately 400 times as long as a day on Neptune.