Naming and Renaming Decimals
Write two and five-tenths in standard form.
2.5
How many centimeters are in a meter?
1 meter = 100 centimeters
1.23 _____ 1.32
1.32 __>___ 1.23
What is twelve plus five?
12 + 5 = 17
How many tenths are in the number 3.4?
34 tenths.
Write 3.45 in word form.
how many millimeters are in a meter?
1 meter = 1,000 millimeters
0.245 _____ 0.25
0.245 __<___ 0.25
What is twelve tenths plus five tenths?
1.2 + 0.5 = 1.7
Round 17 to the nearest ten.
20
What is the value of the thousandths place in decimal form?
0.001
How many centimeters are in a meter? How many millimeters are in a meter?
1 meter = 100 centimeters = 1,000 millimeters
12 hundredths ______ 0.12
12 hundredths ___=___ 0.12
What is the difference between 17.209 and 16.305?
0.904
Round 32.26 to the nearest tenth.
32.3
Write 2.3 in expanded fraction form.
2x1 + 3x1/10
=
2 + 3/10
Convert 2.3 meters to centimeters and millimeters.
2.3 x 10^2 = 230 centimeters
2.3 x 10^3 = 2,300 millimeters
342 hundredths + 7 tenths _____3 + 49 hundredths
342 hundredths + 7 tenths __=__3 + 49 hundredths
Oliver weighs 4.56 pounds. London weighs 65.24 pounds. How much more does London weigh than Oliver?
London weights 60.68 pounds more than Oliver.
Round 2.45 to the nearest tenth and hundredth.
tenth: 2.5
hundredth: 2.45
Write 31.235 in expanded decimal form.
3x 10 + 1x1 + 2x0.1 + 3x0.01 + 5x0.001
=
30 + 1 + 0.2 + 0.03 + 0.005
Convert 4.5 millimeters to centimeters.
First, go to meters:
4.5 divided by 10^3 = 0.0045 meters
Then, go to centimeters:
0.0045 x 10^2 = 0.45 centimeters
14 + 72x0.1 + 4x0.001 ______ 21.24
14 + 72x0.1 + 4x0.001 ______ 21.24
14 + 7.2 + 0.004 ______ 21.24
21.204 __<___ 21.24
Ms. Stewart mixed 10.357 g of chemical A, 12.062 g of chemical B, and 7.506 g of chemical C to make 5 doses of medicine. How much medicine did she make in grams?
10.357
12.062
+ 7.506
___________
29.925 g
Ms. Stewart has 29.925 g of chemicals. About how much chemicals does she have? Estimate by rounding to the nearest tenth.
Ms. Stewart has about 29.9 g of chemicals.