Mental Math
Rounding Decimals
Estimating Sums and Differences
Adding Decimals
Subtracting Decimals
Multiple- Step Problems
100
Beth worked 33.25 hours last week and 23.75 hours this week. How many total hours did she work? Use mental math to solve.
57 hours
100
What is 2.934 rounded to the nearest hundredth?
2.93/ 2.930
100
A dollhouse has 15.15 square feet downstairs and 6.25 square feet upstairs. Which of the following is the best estimate of the total square footage in the dollhouse?
21 feet squared
100
125.9 + 6.77
132.67
100
19.06 - 7.5
11.56
100
Parson's Sporting Goods ordered 56 T-shirts in sizes small, medium, and large. If 23 T-shirts are medium and 12 T-shirts are large, how many are small?
21 t-shirts
200
Ann has one cat that is 13.6 cm tall. She has another cat that is 6.1 cm tall. How much taller is one cat than the other? Use mental math to solve.
7.5 cm
200
Azim kicked a soccer ball 13.48 meters. What is 13.48 rounded to the nearest tenth?
13.5/ 13.50
200
Which two trails combined are less than 4 miles?
Red and Green
200
Adam has $87.25. His friend Kyle owes him $7.69. How much money will Adam have when Kyle repays him?
$94.94
200
The Thomas Jefferson Memorial is on 18.36 acres of land and the Franklin Delano Roosevelt Memorial is on 7.5 acres of land. How many more acres of land is the Jefferson Memorial on than the Roosevelt Memorial?
10.86
200
Monica bought a skirt for $14.50 and a hat for $12.25. What is a way to find how much change she would get from $40?
Add $12.25 to $14.50, then subtract the sum from $40.
300
Use mental math to solve. Kerry has $16.90 in one pocket and $5.10 in another pocket. How much money does she have in all?
$22.00
300
Round this number to the tenths place: 0.153
0.2/0.20
300
Estimate 84.1 + 3.65 + 41.06 by rounding to the nearest whole number. What numbers did you add?
129; 84, 4, 41
300
Eduardo is training for a marathon. He ran his first mile in 12.56 minutes and his second mile in 12.98 minutes. What is his combined time for the first two miles?
25.54 minutes
300
Parker has a rabbit that is 21.9 cm long. Keenan's rabbit is 23.4 cm long. How much longer is Keenan's rabbit than Parker's?
1.5 cm
300
Jared rode 128.5 miles on the first day of a 3-day bike race. He rode half that distance on the second day of the race. If the total distance of the bike race is 300 miles, how far did he ride on the final day of the race?
107.25 miles