Addition & Subtraction
1.23 + 8
9.23
3 x 4.6
20
0.07 x 4
0.28
43.8 / 6 =
7.3
For which 2 operations (addition, subtraction, multiplication, division) do you need to line up the decimal points?
Addition and Subtraction
62 - 48.6
13.4
62 / 2.3
31
0.23 x 6
1.38
4.56 / 6 =
0.76
For which operation (addition, subtraction, multiplication, division) do you need to count the number of digits after the decimal points?
Multiplication
9.6 + 0.18 =
9.78
43.03 / 6.34
7
3.75 x 8 =
30
20.3 / 7 =
2.9
When multiplying by a decimal, how do you know where to put the decimal point in the product?
Count the number of digits after the decimal point in the factors (question), and make sure there are the same number of digits after the decimal point in the product.
5.68 - 4.23 =
1.45
5.68 x 4.23 =
24
8 x 6.5 =
52
32 / 5 =
6.4
When you divide a decimal by a whole number, where do you place the decimal point in the quotient?
Above the decimal point in the dividend.
11.27 + 9.4 - 4.56 =
16.11
26.2 / 5.64
4.2 x 1.8 =
7.56
33.8 / 4 =
8.45
When dividing, what can you do when you have a remainder?
Add a decimal point and additional zeroes in the dividend.