Decimals by powers of 10
0.365 x 104
3,650
5 x 0.5
2.5
0.2 x 0.8
0.16
Natalie likes to mail lots of post cards when she goes on vacation. In 2014, the cost of a postcard stamp was $0.34
Natalie buys 10 postcard stamps. What is the total cost of the stamps?
What if she buys 100 stamps
HINT turn 10 to 101
$3.40
34$
Bradley walks 0.65 mile each Friday to his friends house. He takes a different route home that is 1.2 miles. How many Miles will Bradley walk to his friends house and back in a year?
There are 52 weeks in a year
HINT: you are doing TWO equations
96.2 miles
0.678 x 100
Remember- turn 100 into a power of 10 with an exponent
67.8
0.35x3
1.05
2.4 x 0.7
Nadia drew a square in her notebook. Each side measured 2.5 centimeters.
What is the perimeter?
What is the area?
HINT: perimeter= add all sides together: area= length times width
Area- 6.25
Alyssa paints 3 walls blue. Each of the walls is 8.3 feet tall and 7.5 feet wide.
Find the AREA
( remember area= length x width)
186.75
A credit card is 0.76 mm thick. How thick is a stack of 103 credit cards?
760 mm
100 x 0.12
12
5.2 x 4.6
23.92
402.5 calories
The area of one fabric square is 4.85 square inches. What is the area of a quilt made with 10 2 fabric squares
485
63.7 x 10
637
is 0.8 equal to 80/ 100
Remember the 0 rule
YES
you can add 0's to the end of the decimal and they are equal
6.8 x 7.2
48.96
Derrick runs 2.25 miles each day. How many total miles will he have run after 10 days?
Hint turn 10 into a power of 10
22.5
0.09 x 0.4 as a fraction
9/100 x 4/10
Write 0.48 x 0.3 as FRACTIONS
- Remember- what place is the number furthest to the right
48/100
3/10
One inch equals 2.54 centimeters. how many centimeters is 101 inches?
25.4 inches
8.3 x 6.4
53.12
A farmer plants 0.4 of a field with wheat. The field is 2.3 acres.
How many acres are planted with wheat?
0.92 acres
Write 0.75 x 0.5
75/ 100 x 5/10