Decimal Operations: Addition, Subtraction, Multiplication
Practice adding, subtracting, and multiplying decimals
Decimal Operations: Addition, Subtraction, Multiplication
Practice adding, subtracting, and multiplying decimals
Math - Grade 6-8
- 1
Find the sum: 14.68 + 7.5.
Write 7.5 as 7.50 so the decimal places line up.
The sum is 22.18 because 14.68 + 7.50 = 22.18. - 2
Find the difference: 36.4 - 18.75.
The difference is 17.65 because 36.40 - 18.75 = 17.65. - 3
Multiply: 4.6 x 3.2.
Multiply first as whole numbers, then place the decimal point.
The product is 14.72 because 46 x 32 = 1472, and the factors have a total of 2 decimal places. - 4
A notebook costs $2.85 and a pen costs $1.40. What is the total cost of one notebook and one pen?
The total cost is $4.25 because $2.85 + $1.40 = $4.25. - 5
Maya had 12.5 meters of ribbon. She used 4.85 meters for a project. How many meters of ribbon does she have left?
Add a zero to 12.5 before subtracting.
Maya has 7.65 meters of ribbon left because 12.50 - 4.85 = 7.65. - 6
A bag of apples weighs 2.75 pounds. If you buy 4 bags, what is the total weight?
The total weight is 11 pounds because 2.75 x 4 = 11.00. - 7
Find the value of 9.08 + 0.674.
Line up the decimal points and use zeros as placeholders.
The value is 9.754 because 9.080 + 0.674 = 9.754. - 8
Find the value of 20 - 6.738.
The value is 13.262 because 20.000 - 6.738 = 13.262. - 9
Multiply: 0.36 x 0.8.
Count the decimal places in both factors after multiplying.
The product is 0.288 because 36 x 8 = 288, and the factors have a total of 3 decimal places. - 10
A runner completed 3.25 miles on Monday, 4.1 miles on Wednesday, and 2.875 miles on Friday. How many miles did the runner complete in all?
The runner completed 10.225 miles in all because 3.250 + 4.100 + 2.875 = 10.225. - 11
A rectangular garden is 5.6 meters long and 3.75 meters wide. What is the area of the garden?
Area of a rectangle is length times width.
The area of the garden is 21 square meters because 5.6 x 3.75 = 21.00. - 12
A store sells a water bottle for $8.95. During a sale, the price is reduced by $2.37. What is the sale price?
The sale price is $6.58 because $8.95 - $2.37 = $6.58.