Chapter 3 w/Metric

Rounding

100

Round to the nearest hundredth  

246.3623

246.36

200

Round to the nearest thousandth

1234.23456

1234.235

300

What place value is the 7 in?

1.06879

ten thousandths

400

What place value is the 4 in?

1765.4392581

tenths

500

What is the rule for rounding?

Look to the number to the right of the place value you are rounding to; if it is 5 or greater, round up. If it is 4 or lower, stay the same.

Estimating

100

Estimate using rounding 

6.43 - 4.079

2

200

Estimate using front-end

2.06 +3.91

6

300

Estimate

18.63/2.84

6

400

Estimate using clustering

5.7 + 6.02 + 5.89 + 6.98

24

500

Estimate 

24.568(3.89)

100

Formulas

100

Use the formula to solve d=rt

r=17in/s   t=50s

850in

200

Use the formula to solve A=lw 

l=44m  w=21m

924m²

300

Use the formula to solve P=2l + 2w

l= 44m    w=21m

130m 

400

Use the formula to solve F= 1.8C +32

C= 24

75.2

500

Use the formula d=rt

d=156mi        t= 12min

13mi/min

Solving Equations

100

Solve

x + (-.0025) = .0024

x = .0049

200

Solve

-25 = p + 10.7

p = -35.7

300

Solve 

k/-1.2=-.07

k = .084

400

Solve 

-7.2y=61.2

y= -8.5

500

Write an equation and solve 

A number n divided by the opposite of two and two hundredths is fifty-two and one hundred forty-three thousandths. 

n = -105.32886

Vocab

100

Perimeter

distance around a figure

200

Compatible numbers

numbers that are easy to divide mentally

300

Formula

an equation that shows a relationship between quantities represented by variations 

400

integer

whole numbers and their opposites

500

inverse operation

Undoes the operation, opposite operation