Chapter 3

Rounding

100

Round to the nearest hundredth  

462.356

462.36

200

Round to the nearest thousandth

12.36508

12.365

300

What place value is the 7 in?

1.06879

ten thousandths

400

What place value is the 4 in?

1765.4392581

tenths

Estimating

100

Estimate using rounding 

6.43 - 4.079

2

200

Estimate using front-end

2.06 +3.91

6

300

Estimate

12.89/3.04

4

400

Estimate using clustering

3.7 + 4.02 + 4.89 + 3.98

16

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

Solving Equations

100

Solve

m+3.6=10.3

m=6.7

200

Solve 

n-7.89=21.34

n=29.23

300

Solve 

x/3.5=1.32

x=4.62

400

Solve 

-2.4p=28.8

p=-12

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