Estimation
3 digit by 2 digit
Representing Decimals Multiplication
Multiplying with Decimals
Prime and Composite
100
A special sale table at a bookstore had all books for $2.95. Which of these is closest to the cost of four books from the table?
What is $12
100
563 x 25
What is 14,075
100
Pilar colored in a decimal grid to multiply two decimals. What multiplication equation is represented by the model?
What is 0.3 x 0.7=0.21
100
Leon wrote the product below without a decimal point. Where should he place the decimal point?
6.18 × 0.3 = 1854
What is place the decimal point after the 1.
100
Javier’s class assignment is to write factor pairs. Javier wrote four factor pairs for the number 144, as shown below.
12 X 12
6 X 24
3 X 18
9 X 16
Which of Javier’s factor pairs contains a prime number?
What is 3 x 18?
200
Carlos went to the store to buy an outfit for a party today. He bought a pair of pants for $32, two shirts for $18 each, nd a pair of shoes for $77. What is the best estimate of the total money that Carlos spent at the store?
What is $150
200
Martha's car can travel 362 miles on a full tank of gas. How many miles can Martha drive if she fills up the tank 38 times
What is 13,756
200
Which of the following equations is represented by the number line above?
What is 1.5 x 4=6.0
200
Dion ran 3.75 kilometers each day to prepare for a race. What was the number of kilometers that Dion ran during 28 days?
What is 105 km.
200
On the past 4 science quizzes, Omar earned 73, 85, 93, and 99. Which of his quiz scores is NOT a composite number?
What is 73?
300
Paula wants to buy 3 shirts and 2 belts. The shirts cost $16.89 each, and the belts cost $8.97 each. Paula has $45. Which of these amounts is the best estimate of how much more money Paula needs in order to buy the shirts and belts?
What is $24.
300
There are 28 water tanks on a farm. Each tank holds 305 gallons of water. How many gallons of water would it take to fill all of the tanks?
What is 8,540
300
Which multiplication sentence is represented by this decimal model?
What is 0.4 × 0.5 = 0.20
300
Find the product of 7.5 and 49.
What is 367.5
300
Identify the prime numbers from the list below.
6 17 28 39 40 53
What is 17 and 53
400
Kayla went shopping on Saturday afternoon. She had a total of $200 to spend for school clothes. At the mall, she bought two pairs of jeans for $24. 99 each, two T-shirts for 9.75 each, and a pair of shoes for $39.18. She spent the rest of the money on tennis shoes and a backpack. About how much money did Kayla’s tennis shoes and backpack cost?
What is $90
400
A company makes 625 cell phone cases each day. How many cell phone cases does the company make in 31 days?
What is 19,375
400
Which equation matches the model?
What is 0.15 × 3 = 0.45
400
Jamal’s mom bought 48 glass jars and filled each jar with scented candle wax. She sold each candle jar for $4.77. How much money did Jamal’s mom collect?
What is $228.96
400
Four students each wrote down a number between 30 and 40. The list shows the numbers they wrote:
-Elly:35
-Ulysses:39
-Maggie:37
-Palmer:33
Which student wrote down a Prime number?
Who is Maggie?
500
Mr. Marquez had 123 eggs in the fridge of his restaurant. He put 32 more cartons of eggs in the fridge. Each carton contained 18 eggs. Which of these is the best estimate of the number of eggs he has in his fridge now?
What is 700?
500
At the jelly bean warehouse, Maggie helps her father pack jelly beans into boxes. They put 398 jelly beans in each box and 24 boxes in each crate. How many jellybeans are in each crate?
What is 9,552
500
Use the graphic below to find the product of 4 and 0.18.
What is 0.72
500
Mr. Nolan paid $36.95 for each adult shirt and $23.95 for each youth shirt he bought. Mr. Nolan bought 2 adult shirts and 5 youth shirts. How much money did he spend on these shirts?
What is $193.65
500
Brenda said that the number 2 is prime because it only has two factors. Carla said that the number 2 is composite because it is even, and all even numbers are composite. Who is correct?
Who is Brenda?