Word problems
Alberto ran 15.6 km on Monday, 12.8 km on Tuesday, and 6.5 km on Wednesday. Dennis ran 11.25 km on Monday, 14.6 km on Tuesday, and 8 km on Wednesday. Who ran farther?
Alberto- 15.6 + 12.8 + 6.5 = 34.9
Dennis- 11.25 + 14.6 + 8 = 33.85
Alberto ran farther.
0.02 + 0.89 =
What is 0.91
0.6 x 12.8
7.68
4/28 or 1/7
What needs to be changed in order to divide decimals?
The divisor needs to become a whole number
Talia measured two strings. The green string was 2.37 cm long. The blue string was 4 cm long. How many centimeters longer was the blue string than the green string?
4.00 - 2.37 = 1.63
8.71 - 0.4 =
8.31
15.2 x 5.22
79.344
11/5 x 7/2 =
77/10 or 7 7/10
When you multiply decimals, how do you know where the decimal goes in the answer?
Count the number of place values used in the problem.
The length of Chen’s office is 12.5 feet and the width is 9.4 feet. Use the formula P = 2l + 2w to find the perimeter of the office.
What is 43.8 feet
98 + 3.79 =
101.79
137.5/5
27.5
1/2 / 2/5
5/4 or 1 1/4
How do you multiply mixed numbers?
Change the mixed numbers to improper fractions then multiply straight across
The area of a rectangular garden is 10 1/2 sq. ft. the length of the garden is 3 3/4 ft. What is the width of the garden? A = l * w
88/30 ft or 2 4/5 ft
51.92 - 28.003 =
23.917
8.9/0.4
22.25
3 1/6 * 2 3/4
209/24 or 8 17/24
When adding or subtracting decimals you need to?
Line up the decimals and place values
A marathon consists of 26.2 miles. If there are 320 runners who donate $2.50 for each mile they run, what is the total amount of money that is donated?
$20,960
205.4 - 99.7 =
105.7
86.52 divided by 4.2
20.6
4 1/2 / 2 2/3
27/16 or 1 11/16
When dividing decimals and there is a remainder, you can do this to keep dividing.
Adding a decimal and a zero
Mason has a garden that is 3.4 meters by 6.5 meters. If fencing costs $2.25 per meter, how much will it cost to enclose the gadren?
$44.55