You multiply as if the factors were whole numbers, then you count the decimal places in both factors and put the same number of decimal places in the product.
100
24.396/3.21
7.6
200
What do you need to do in order to add numbers that have decimals in them?
You line up the decimals.
200
57.2-18.34
38.86
200
.08 * .3
2.4
200
Your aunt has $21 and she wants to split it evenly with her 4 nieces. How much does each one get?
Each one gets $5.25
300
65.31 + 3.3 + 2=
70.61
300
What do you need to do before you subtract numbers with decimals?
You line up the decimals.
300
9.8 * 4.6
45.08
300
Which number needs to be a whole number before you can divide it?
The divisor must be a whole number.
400
Maria went to the store and bought three things. She bought an apple for $0.69, a candy bar for $1.29 and a jug of milk for $2. How much did she spend in all?
$3.98
400
64-26.72
37.28
400
125.3*3.7
463.61
400
21.35/0.61
35
500
2.7 + 39.5 + 16.44 + 9
67.64
500
It is 102 degrees Fahrenheit in Tucson, and 75.5 in San Diego. How much hotter is it in Tucson?
It's 26.5 degrees hotter in Tucson
500
67.8*.419
28.4082
500
At the end of dinner, the total bill comes out to $53. All 5 friends split the bill evenly. How much does each one pay?