Adding, Subtracting Decimals
Before you add and subtract decimals you must do *This* with the decimal points
Line up the Decimal Points!
Bonus: And Add 0's as place holders
Before you can multiply decimals, you need to _____ and then you _____ and then you _____
Remove the Decimal
Multiply Normal
Put the decimal back in
When dividing decimals, you need to get rid of decimals:
A. Inside the house
B. Outside the house
C. Both
What is the common denominator for 2/5 + 1/3 and what do the fractions turn into?
15
6/15 + 5/15
True or False:
When creating equivalent fractions you have to multiply by the same number on the top and bottom
True
What is 2.5 + 1.4
3.9
2.5 x 0.001 equals:
A. 2.5
B. 0.025
C. 0.0025
C. (4 numbers behind the decimal point = 4 numbers behind the decimal point)
When you move the decimal point on the outside you also have to do what?
Move the decimal point on the inside the same number of spaces
What is 3/8 + 4/5
47/40 or 1 and 7/40
Which is NOT an equivalent fraction to 4/6?
A. 2/3
B. 6/4
C. 8/12
D. 40/60
B. You can't just flip them
(A = simplified)
(C = x2)
(D = x10)
What is 18 - 4.6
13.4
What is 0.8 x 0.2
0.16
What is 1.2 divided by 4
0.3
What is 8 and 2/3 - 3 and 1/4
5 and 5/12
What is an improper fraction?
When the numerator (top) is bigger than the denominator (bottom)
A map is 2.5 ft long and 3.25 ft wide. What is it's perimeter?
11.5 ft
What is 1.1 x 1.1
1.21
What is 1.55 divided by 0.5
3.1
What is 5 and 1/2 - 2 and 2/3
2 and 5/6
What is 4 and 2/5 as an improper fraction?
22/5
On the menu, you order a hotdog for $4.39 and small drink for $1.09 - what is your change from $10?
$4.52
A map is 3.24 ft long and 1.2 ft wide, what is it's Area?
Area = multiply
Perimeter = Add
3.888 ft squared
30
A garden has a width of 15/2 feet and a length of 8/5 feet. What is it's perimeter?
Perimeter = Add
18 and 1/5 or 182/10
What is 18/7 as a mixed number?
2 and 4/7