Math Review

Estimating

100

 Another name for estimate

Rounding

200

10,133 rounded to the nearest hundred

10, 100

300

122,453 rounded to the nearest hundred

122,500

400

78,955 rounded to the nearest ten thousand

80,000

500

45, 135 rounded to the nearest thousand

45,000

Comparing Numbers

100

The alligator always eats the ____________

number

bigger

200

Arrange these numbers from least to greatest

8,002  2,080,  820  2,008  8,200

820,  2,008  2,080  8,002  8,200

300

Use each of the digits 5,4,3,2,1 exactly once to create two different five-digit numbers

Create a comparison statement for the two numbers you created

show to the teacher

400

975,462 songs were downloaded in one day. Round this number to the nearest hundred thousand to estimate how many songs were downloaded in one day.

1,000,000

500

Estimate the difference by rounding each number to the given place value

712,350-342,802

a.round to the nearest ten thousands

b.round to the nearest hundred thousands

a. 369,548 =370,000

b. 369,548 = 400,000

Multi-digit Addition

100

6,311+268

6,579

200

34,698+71,840

106,538

300

8,314+2,493

10,807

400

527+275+752

1,554

500

38,193+6,376+241,457

286,026