Operations On Decimals

Question 1

If you add zeros after the decimal point, does it add numbers?

Answer 1

No, but you can not add them right after the decimal. (2.45 not 2.045)

Question 2

What does estimate, overestimate, and underestimate mean?

Answer 2

Estimate is an approximate answer, overestimate is going over the actual number and underestimate is going under.

Question 3

What are 2 ways to estimate?

Answer 3

• Front-end estimation

* Relative size estimation

Question 4

How do you front-end estimate?

Answer 4

Take the leading decimal and turn it into a ten, as well as all others in the problem and add/subtract/multiply/divide. Add the decimal to where it seems most appropriate.

Question 5

How do you do relative size estimation?

Answer 5

Round the full numbers to the closest tens and then add them together.

Question 6

Seal McGee spent $12.50 on a new fishy, $5.30 on the new book, Afriald’s new legs and $2.28 on a flower for his girlfriend, Pug Squishedson. How much did Seal McGee spend in total?

Answer 6

$20.08.

Question 7

How can you show a repeating decimal?

Answer 7

__

0.28, 0.1…

Question 8

What is a dividend, a divisor, and a quotient?

Answer 8

Dividend- the number that must be divided into equal groups
Divisor- the number on groups the dividend must be divided into
Quotient- the answer to a division question.

Question 9

What do you do to a decimal number after the decimal?

Answer 9

Add ths, like tenTHS, hundredTHS, thousandTHS