Decimals 1
Decimals 2
Whole number multiplication
Decimal + and -
Decimal multiplication
Can use a calculator!
100
In the decimal 4.362, what is the value of the digit 6? (write your answer using words)
six hundredths
100
What is the value of 35.6 x 1,000?
35,600
100
What is the product of 209 and 54?
A. 1,881
B. 11,186
C. 11,286
D. 1,566
Using estimation,200 x 50 = 10,000, so answer choices A (1,881) and D (1,566) can be eliminated because they are WAY too low.
C. 11,286
100
What is the sum of 3.456 + 2.37 ?
5.826
100
The large square represents 1 whole. Write an equation to show the multiplication problem that is modeled.
0.7 x 0.6 = 0.42
or
0.6 x 0.7 = 0.42
100
Each large square has a value of 1. What is the value of all of the shaded parts together?
0.6 + 0.76 = 1.36
200
Write the number eight and thirty-five thousandths as a decimal.
8.035
200
Fill in the missing information.
92.5 (x or -: ) ________ = 0.925
-: 100 or x 1/100 or x 0.01
200
Marcus solved 325 × 46 and got 3,250. His work is shown below. Find his mistake and fix it. Then calculate the correct product.
Using estimation, the product should be close to 300 x 50 = 15,000, so since his answer was 3,250 it seems like this might be a place value issue.
The second line of the multiplication should be 13000, not 1300. The correct product is 14,950.
200
Subtract 7.89 - 3.92
3.97
200
Multiply: 0.6 × 4. Use numbers or a model to multiply 0.6 x 4.
Work should be shown on your board.
2.4
200
A recipe calls for 2.5 cups of flour. If you already added 1.75 cups, how many more cups do you need to add?
0.75 cups
300
Write the value of 0.7 + 0.008 + 0.03 + 5
5.738
300
When 472 is divided by 100 (or multiplied by 1/100 or 0.01), what is the result?
4.72
300
Without finding the exact products, decide whether the first product is greater than, less than, or equal to the second. Write <, >, or = in the box, and use estimation to explain how you know.
198 × 52 ☐ 305 × 41
Estimation: 198 × 52 is about 200 × 50 = 10,000, and 305 × 41 is about 300 × 40 = 12,000.
The estimate for the second product is greater, so 198 × 52 < 305 × 41
300
Mrs. Nagy has $46.75 in her wallet. Then she puts $23.45 more in her wallet. How much money does she have in her wallet now?
$70.20
300
Maya buys 6 notebooks. Each notebook costs $2.35. How much does Maya spend?
Your answer will be an amount of money. Write your answer the way we write money.
6 × $2 = $12.00 and 6 × $0.35 = $2.10
$14.1 is mathematically correct, but in the United States we usually write digits to the hundredths place to show cents.
$14.10
300
A theater has 38 rows of seats with 26 seats in each row. For Friday’s show, 912 tickets were sold. How many seats were empty on Friday?
38 rows × 26 seats in each row = 988 seats in the theater
988 seats − 912 tickets sold = 76 empty seats
400
Which choice is the expanded form for 602.049?
400
Write these decimals in order, from least to greatest.
0.65 0.205 0.25 0.3 0.073
0.073 0.205 0.25 0.3 0.65
400
A school orders 24 boxes of pencils. Each box holds 144 pencils. How many pencils does the school order in all?
24 x 144 = 3,456 pencils
400
James had 6.75 gallons of water in a tank. After using some water, he had 2.38 gallons left. How many gallons of water did James use?
4.37 gallons
400
Priya says that 4.8 × 6.2 = 2.976. Use estimation to explain whether her answer is not reasonable. Then find the correct product.
4.8 is about 5, and 6.2 is about 6, so the product should be about 30. Priya’s answer of about 3 is much too small.
The correct product is 29.76
400
Alyssa walked 1.34 fewer miles than Emily. Alyssa walked 2.56 miles. How many miles did Emily walk?
2.56 + 1.34 = 3.9
Alyssa walked FEWER miles, so Emily walked MORE than she did! We have to add 1.34 to Alyssa's miles to get Emily's miles!