Decimal Basics
Decimal Computation 1
Decimal Computation 2
WP 1
WP 2
100
Write an appropriate number in each box.
5.42, 5.47
3.21, 3.25
100
1.8 + 19 =
20.8
100
2.3 - 2.03 =
0.27
100
Dr. Sun drives between 25 and 30 miles every weekday. He works five days a week. Which is a reasonable estimate of the number of miles he will be driving this week?
A 100 miles
B 125 miles
C 160 miles
D 165 miles
25 x 5 = 125
30 x 5 = 150
B
200
Write fifty-one thousandths as a decimal.
0.051
200
7.75 x 0.01 =
0.0775
200
0.919 ÷ 0.1 =
9.19
200
A rectangular garden has an area of 20.25 square meters. The length of the garden is 5.4 meters. What is the width, in meters, of the garden?
20.25 ÷ 5.4 = 3.75 m
200
A parking lot charges a $2.00 entrance fee and $1.25 per hour of parking. What is the cost of parking there for 6 hours?
2 + 1.25 x 6
= 2 + 7.5
= $9.50
300
Write 4.067 in words using place value.
four and sixty-seven thousandths
300
1.304 x 8.6 =
11.2144
300
3.57 x 0.486 =
1.73502
300
What is the volume, in cubic centimeters, of the gift box?
8.4 x 4.2 x 3.5 = 123.48 cm3
300
Avril uses a 2-liter pitcher to serve coffee to 20 of her friends. How many times will she need to fill the pitcher to serve each friend 400 milliliters?
400 x 20 = 8000 ml = 8 L
8 ÷ 2 = 4
400
Round 4.192 to the nearest tenths.
Round 3.004 to the nearest hundredths.
Round 2.9154 to the nearest thousandths.
4.2, 3.00, 2.915
400
9 ÷ 8 =
1.125
400
7 ÷ 20 =
0.35
400
In a science class, Sunny made a mixture by adding 0.35 liters of ethanol peroxide and 6.15 liters of water together. Equal amounts of the whole mixture were poured into 5 empty containers. How much of the mixture, in milliliters, did he pour into each container?
0.35 L = 350 ml, 6.15 L = 6150 ml
350 + 6150 = 6500 ml
6500 ÷ 5 = 1300 ml
400
A wall is 12 meters long and 3 meters high. Each brick is 25 centimeters long and 3 centimeters high. How many bricks does it take to build the wall?
(1200xx300)/(25xx3)
=(12xx100xx300)/(25xx3)
=12xx4xx100
=4800
500
Order from least to greatest: 4.6, 4.06, 4.066, 4.46, 4.04.
4.04, 4.06, 4.066, 4.46, 4.6
500
15.17 ÷ 4.1 =
3.7
500
0.4094 ÷ 0.89 =
0.46
500
Aurelien bought 15 pounds of walnuts at $9.40 per pound and 12 pounds of almonds at $3.75 per pound. He mixed up the nuts and sold them to customers. How much is each pound of mixed nuts worth? Round your answer to the nearest cent.
(9.4xx15+3.75xx12)/27
=(141+45)/27=186/27=6 24/27
=6 8/9 ≈ 6.89
500
The school store bought a box of USB drives for $120.00. The box contains 80 USB drives. The school store sold each USB at $2.75. How much money can the store make on one box of USB drives?
80 x 2.75 - 120
= 220 - 120
= 100