Mystery Multiplication
381x9?
3,429
One meter is equal to about 3.281 feet. What is this number of feet rounded to the nearest tenth?
3.3 Feet
What do you do first - addition or multiplication when evaluating an expression?
When evaluating an expression, multiplication (and division) comes before addition (and subtraction) according to the order of operations.
The order of operations is often remembered with the acronym PEMDAS:
Parentheses
Exponents
Multiplication and Division (from left to right)
Addition and Subtraction (from left to right)
3/5 + 2/10?
4/5
Mr. Brooks bought the amounts of clay listed for his class.
• 2.2 kilograms
• 1.5 kilograms
• 850 grams
• 700 grams
How many grams of clay did Mr. Brooks buy?
w. 5,350 grams
x. 4,350 grams
y. 3,950 grams
z. 6,200 grams
w. 5,350 grams
What is the value of 217 × 33?
7161
Round .567 to the nearest hundredth
0.57
What is the value of this expression? (5 + 3) x (4 - 2)
16
Find the sum. 1 1/4 + 5/6
2 1/12
An art teacher has 192 boxes of crayons. Each box has 48 crayons. What is the total number of crayons the art teacher has?
a. 1,536
b. 9,216
c. 240
d. 9,600
b. 9,216
The first layer of a rectangular prism is packed with 15 unit cubes. There are no spaces or gaps between the cubes. The prism is 3 unit cubes tall. Write the expression that would represent the volume of the rectangular prism?
15x3
What is 473.69 rounded to the nearest whole number?
474
Write the expression for the following statement? “the quotient of 8 and 4, times 7, plus the difference of 38 and 15”
(8 / 4) x 7 + (38-15)
Carol has 8 3/4 yards of material. She needs to use 1/3 of the material to make a dress. How many yards of material will she need to make the dress?
2 11/12 yards
Select the three numbers with values less than “twelve and thirteen hundredths.”
A. twelve and one hundred forty-six thousandths
B. twelve and twenty-five thousandths
C. twelve and five tenths
D. 12.103 E. 12.072
B, D, and E
A rectangular prism has the following dimensions.
• length 5 inches
• width 4 inches
• height 1 inch
What is the volume, in cubic inches, of the prism?
20 cubic inches
What is the sum of 42.6 + 0.45 + 30.22?
73.27
Evaluate the expression. 64 ÷ (15 − 5 + 12 ÷ 2) + 9 × 2 − 1
21
Sari had 3/4 of a bag of pretzels. Her younger brother ate some, leaving her with 1/8 of a bag. What fraction of the bag did Sari’s brother eat?
M. 4/12
P. 2/4
R. 5/8
S. 7/8
R. 5/8
A group of 4 students paint a total of 10 posters. Each student does the same amount of work and each poster is the same size. How many posters did each student paint?
A. 1/40
B. 2/5
C. 2 1/5
D. 2 1/2
D. 2 1/2
What is the value of the digit 7 when 2.7 is multiplied by 10 to the power of 2?
70
7.89x6?
47.34
6+3×(5+2)÷7−4
5
The Carson family went fishing. They caught a 2 5/8 pound trout and a 1 1/2 pound bass. Which calculation shows how many more pounds the trout weighed than the bass?
L. 2 5/8 - 1 1/2
M. 2 5/8 + 1/2
N. 2 x 5/8 + 1 1/2
O. 2 5/8 / 1/2
L. 2 5/8 - 1 1/2
Suzan collected 560 milliliters of rainwater on Saturday. She collected 3.5 liters of rainwater on Sunday.
How many total milliliters of rainwater did Suzan collect on Saturday and Sunday?
A. 910
B. 4,060
C. 4,600
D. 9,100
B. 4,060 milliliters