Decimals
42.8 + 7.97
50.77
Remember to always line up your decimal point and place value when adding and subtracting decimals.
5 ⅔ + 6 ½ =
12 1/6
568 divided by 0.4
1420
difference
subtraction
What is the area of a square with a side length of 78?
6,084
Area is length x width
56.7 - 8.68
48.02
5 ⅛ - 2 ¾ =
2 3/8
Remember if you have to borrow from the whole number bring over a fraction that equals 1.
5 divided by ½
10
Remember - Keep, Change, Flip
share equally
division
True or false
All parallelograms are quadrilaterals.
True
45.7 X 7.95
363.315
Remember - count the place values you move the decimals out to make whole numbers and then put the decimal back into your product.
⅘ of 25 =
20
Carly and Ramil share 7 yards of ribbon equally. How
much ribbon will each get?
7/2 or 3 1/2 yards
Sum
answer to addition
On a line in a coordinate plane the rule is multiply x by 1/2. What are the y coordinates?
0
4
8
(0, 0)
(4, 2)
(8,4)
56.8 divided by 0.4
142
Remember- the divisor has to be a whole number, so you need to multiply both numbers by 10 first to make 0.4 = 4 and then 56.8 becomes 568
Jason is making a floorplan drawing. Everything has dimensions that are 1/8 of the actual size. His bed measures 6 ft by 3 ft. What is the size in his drawing?
1/8 X 6 =6/8 ft
1/8 X 3 = 3/8 ft
¾ divided by 2
3/8
Remember - division with decimals is keep, change, flip
product
answer to multiplication
The volume of a rectangular prism is 504 in. If the area of the base is 56 in, find its height.
9 inches
56.8 divided by 2
24.4
Remember when the total has a decimal, move the decimal out and then put it back in by the same amount of place values. Always check your answer by multiplying.
2 X _ < 2
2 multiplied by any number less than one will get an answer less than 2.
Examples 1/2, 3/4, 1/8
441 divided by 18
24.5 or 24 1/2
the answer to division
A tile is ¼ inches long and ¾ inches wide. What is the area of one tile? What is the area of 5 tiles?
The area of 5 tiles is 15/16 inches