Decimals

Question 1

How do you add decimals?

Answer 1

1. Stack up the numbers, lining them up by the decimal. Fill in any blank spots with zeros.
2. Add the columns, starting at the right.

Question 2

How do you subtract decimals?

Answer 2

1. Stack up the numbers, lining them up by the decimal. Fill in any blank spots with zeros.
2. Add the columns, starting at the right.

Question 3

What are the names of the places after the decimal point?

For example, in the number 1.743:

• What place is the 7 in?
• What place is the 4 in?
• What place is the 3 in?

Answer 3

Question 4

How do you multiply decimals?

Answer 4

1. Stack up the numbers, aligning them so that all of them are all the way pushed to the right.
2. Multiply like normal (ignoring the decimal places for a second).
3. Count how many decimal digits there are in the numbers you’re multiplying. Your final answer will have this many decimal digits.

Question 5

Calculate the following:

2.35 × 7.8

Answer 5

Question 6

How do you divide a decimal number by a whole number?

Answer 6

1. Put them in the “long division” box just like normal.
2. Put a decimal point on top of the box right above the other one.
3. Divide like normal.

Question 7

Calculate the following:

73.59 ÷ 2

Answer 7