Enter Title

Estimating!

100

When adding & subtracting, if the values are less than 1 we round to the nearest.....

half!

200

When adding and subtracting, if the values are larger than 1, round to the nearest....

whole number

300

ESTIMATE:

7.85+12.1

20

400

ESTIMATE!

-.94+(-.58)

-1.5

500

ESTIMATE

9/16-7/15

0

Adding Rat'l #'s

100

When adding and subtracting fractions, you need...

common denominators

200

When adding and subtracting decimals, you must...

line up decimals

300

-1/3+4/9

1/9

400

-4 2/3 + (-3 1/2)

-8 1/6

500

.43 + (-.42)

.01

Subtracting Rational #'s

100

When you subtract, you really...

add the opposite

200

-1/4 - 1/2

-3/4

300

0.5-2.1

-1.6

400

1/8-2/3

-13/24

500

-5 1/2 - 3 1/4

-8 3/4

Estimating products/quotients

100

When estimating with products and quotients, we use numbers that work well together. These are called....

compatible numbers

200

ESTIMATE

22.3 divided by 7

3

300

-0.5(40.9)

-20

400

-153.5 divided by -24.9

6

500

-1/8(63)

-8

multiply & divide rat'l numbers

100

when the signs are the same, the answer is

positive

200

when the signs are different, the answer is...

negative

300

-3/8(-1/2)

3/16

400

-2 3/5(-1 1/3)

3 7/15

500

two problems!

9 divided by (-1 1/4)

-.4 divided by 1.6

-7 1/5

-.25