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Place Value
Expanded Form
Rounding
Estimation with Addition and Subtraction
Estimation Word Problems
100
What is the place and value of the 6.


        925,678,156

hundred thousands and 600,000
100
Write 145,209 in expanded form.
100,000 + 40,000 + 5,000 + 200 + 9
100
Round 56,287,985 to the nearest hundred thousands.
56,300,000
100
Solve by rounding to the nearest tens.

389 + 295

690
100

A famous singer has a fan club with members all around the world. Among its members are 511 men and 918 women. About how many members does the fan club have?

1400 or 1430
200

What is the place and value of the 1.


        841,740,275

millions and 1,000,000
200

Write 976,123 in expanded form.

900,000 + 70,000 + 6,000 + 100 + 20 + 3
200

Round 923,198,278 to the nearest millions.

923,000,000
200

Solve by rounding to the nearest hundreds.

            1739 + 8736

10,400
200

A family and a couple live together in a duplex. Last year, the family used 799 kilowatts of electricity and the couple used 167 kilowatts. In total, about how many kilowatts did they use last year? 

1000 or 970
300

What is the place and value of the 9.



        925,678,156

hundred millions and 900,000,000
300

Write 2,753,927 in expanded form.

2,000,000 + 700,000 + 50,000 + 3,000 + 900 + 20 + 7
300

Round 128,345,780 to the nearest hundreds.

128,245,800
300

Solve by rounding to the nearest hundreds.

        6207 - 1867

4300
300

There was a nest of fish eggs in Princeton River; 602 of the eggs hatched and 590 of them didn't. About how many eggs were there in total?

1190 or 1200
400

What is the place and value of the 7.


              203,369,734

hundreds and 700
400

Write 943,829,167 in expanded form.

900,000,000 + 40,000,000 + 3,000,000 + 800,000 + 20,000 + 9,000 + 100 + 60 + 7
400

Round 1,785,938,287 to the nearest billions.

2,000,000,000
400

Solve by rounding to the nearest thousands.

                  15,789 -12,681

3000
400

A construction company is repaving a damaged road. So far, they have repaved a total of 531 centimeters of the road. Today, they repaved 136 centimeters of the road. About how many centimeters of the road had they repaved before today?

390 or 400
500

What is the place and value of the 8.



       8,923,456,764

billions and 8,000,000,000
500

Write 1,956,290,006 in expanded form.

1,000,000,000 + 900,000,000 + 50,000,000 + 6,000,000 + 200,000 + 90,000 + 6
500

Round 674,987,653,198 to the nearest hundred billions.

700,000,000,000
500

Solve by rounding to the nearest hundreds.

            57,895-38,926

18,900
500

Recently, the value of Justin's college savings fund decreased by $385. If his fund was worth $873 before, about how much is it worth now?

580 or 500