Multiple Choice
Kayla’s dollhouse has 15.15 square feet downstairs and 6.45 square feet upstairs. What is the estimated total area if you round the decimals to the nearest tenth?
a. 21.0
b. 21.6
c. 21.7
b. 22.0
c. 21.7
Lawrence spent $1.89 on a bottle of paint and $0.45 on a brush. What was the total amount he spent?
$2.34
Ed is training for a race. He ran 12.56 miles on one day, 12.98 miles the second day and 13.04 miles the third day.
a. What is his combined distance for the first three days?
b. How much farther did he run the second day than the first day?
a. 38.58 miles
b. 0.42 miles
A rectangular yoga studio is 25.5 feet long and 13.62 feet wide. Round the length and width to the nearest whole number. Then estimate the perimeter of the yoga studio. Write an equation to model your work.
26 + 26 + 14 + 14 = 80 feet
or
(2 xx 26) + (2 xx 14) = 80 feet
Estimate the sum of $12.15, $16.85, and $1.74 by rounding each number to the nearest tenth.
a. $30.70
b. $30.80
c. $31.00
d. $30.00
b. $30.80
Marcus measured the width of different butterfly wings. The blue wing was 3.05 cm and the orange wing was 1.65 cm. How much wider is the blue wing?
1.40 cm (1.4)
For her birthday, Lucy received $20 from her aunt, $15 from her grandmother, and $32 from her cousins. She bought an e-book for $10.85. How much birthday money does Lucy have left?
$56.15
A rectangular yoga studio is 25.5 feet long and 13.62 feet wide. Round the length and width to the nearest tenth. Then estimate the perimeter of the yoga studio. Write an equation to model your work.
25.5 + 25.5 + 13.6 + 13.6 = 78.2 feet
or
(2 xx 25.5) + (2 xx 13.6) = 78.2 feet
What is the sum of 2.65 + 3.78
a. 5.33
b. 5.43
c. 6.33
d. 6.43
d. 6.43
Sammie has $8.50. She bought a dozen eggs for $4.80. How much change should she expect back?
$3.70
Amber bought a hardcover book for $23.70 and a paperback for $6.91.
a. How much did she spend in all?
b. If she paid with 2 twenty-dollar bills, how much change did she get?
a. $30.61
b. $9.39 (40-30.61)
A rectangular yoga studio is 25.5 feet long and 13.62 feet wide. Find the exact perimeter. Write an equation to model your work.
25.5 + 25.5 + 13.62 + 13.62 = 78.24 feet
or
(2 xx 25.5) + (2 xx 13.62) = 78.24 feet
Which decimal makes this equation true?
4.95 + ___ = 12.1
a. 7.15
b. 7.85
c. 8.15
d. 8.85
a. 7.15
Lulu ran 4.25 miles on Monday and 1.55 miles on Tuesday. How many mile did she run?
5.80 miles (5.8)
The Thomas Jefferson Memorial is on 18.36 acres of land, the Franklin Delano Roosevelt Memorial is on 7.5 acres of land, the Vietnam Veterans Memorial is on 8.9 acres of land, and the World War I Memorial is on 9.6 acres of land.
a. Which two memorials have the greatest difference of area?
b. What is the difference between the areas of these two memorials ?
a. The Thomas Jefferson Memorial (18.36 acres) and the Franklin Delano Roosevelt Memorial (7.5 acres)
b. 10.86 acres
Which perimeter was closer to the exact perimeter? Why?
(a) Estimating to the tenths was closer to the exact perimeter because (b) the estimated values were closer to the exact values.