Place Value
Powers of 10
Round/Compare/Write Decimals
Adding Decimals
Subtracting Decimals
100

What is the value of the underlined digit?

6.547

0.5 (five tenths)

100

10 x 10 x 10 x 10 in base/exponent form

104

100

5.67 rounded to the nearest tenth

5.7

100

7.8 + 4.3

12.1

100

8.7 - 4.3

4.4

200

A digit 4 in the ones place would have what value?

4

200

What is the value of 105?

100,000

200

0.046 rounded to the nearest hundredth

0.05

200

6.5 + 1.42

7.92

200

6.98 - 2.5

4.48

300

7.8_5

If the missing digit is worth three hundredths, what is the digit?

3

300

What happens when you multiply or divide by a power of 10? (hint: think zeros)

You add or take away the number of zeros that match the exponent

300

Which of these is the greatest?

0.46, 46, 4.6

46

300

How do you use front-end estimation to estimate a sum?

Take the first nonzero digit of each addend, drop all the other digits, and add

300

9.45 - 4.007

5.443

400

For the digit 8 to be worth 80, what place would it need to be in?

tens

400

3,400 x 104

34,000,000

400

How would you say the name of this decimal?

1.82

one and eighty-two hundredths

400

0.035 + 0.226

0.261

400

0.764 - 0.5

0.264

500

How many times greater is the 9 in 98.5 than the 9 in 49.6?

10 times greater

500

750,000,000 -: 10^3

750,000

500

Round seven and six hundred fifty thousandths to the nearest whole number

8

500

12.4 + 2.343

14.743

500

17.43 - 2.706

14.724