Decimals Flashcards
1
Q
How do you add decimals?
A
- Stack up the numbers, lining them up by the decimal. Fill in any blank spots with zeros.
- Add the columns, starting at the right.
2
Q
How do you subtract decimals?
A
- Stack up the numbers, lining them up by the decimal. Fill in any blank spots with zeros.
- Add the columns, starting at the right.
3
Q
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?
A
4
Q
How do you multiply decimals?
A
- Stack up the numbers, aligning them so that all of them are all the way pushed to the right.
- Multiply like normal (ignoring the decimal places for a second).
- Count how many decimal digits there are in the numbers you’re multiplying. Your final answer will have this many decimal digits.
5
Q
Calculate the following:
2.35 × 7.8
A
6
Q
How do you divide a decimal number by a whole number?
A
- Put them in the “long division” box just like normal.
- Put a decimal point on top of the box right above the other one.
- Divide like normal.
7
Q
Calculate the following:
73.59 ÷ 2
A