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Mental Math
Rounding
Addition and Subtraction
Comparing/Ordering
100

Represent this number using base ten blocks:

4 593 162

4593 x 1000

1 x 100

5 x 10

2 x 1

100
What is 100 + 400?
500
100
Round 23 to the nearest 10.
20
100

Solve 649 + 45

694

100

Order in ascending order: 456, 342, 845, 456.2, 456.02, 12.

12, 456, 456.02, 456.2, 342, 845.

200
Write this number in expanded form: 456 720
400 000+ 50 000+ 6 000+ 700 + 20
200
What number is missing? 800 000 + ___________ = 1 000 000
200 000
200
Round 549 to the nearest 100.
500
200

Solve 649 - 95

554

200

11.1 ___ 13

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300
In this number: 784 163 038, what is the 7 equal to?
700 000 000 (seven hundred million)
300
What is 824 - 310?
514
300
Round 1 558 to the nearest thousand.
2 000
300

Solve 394 389 + 392 383

786 772

300

25.5 ___ 25.05

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400
Write eight million, nine hundred sixty-eight thousand, thirty-two in standard form.
8 968 032
400
What number is missing? 350 + _____ = 1 000
650
400
Round 9 483 to the nearest 10.
9 480
400

Solve 794 349 - 392 383

401 966

400

Place in descending order:

90, 9, 900, 900.1, 0.9

900.1, 900, 90, 9, 0.9

500
Write the number two million and two in standard form.
2 000 002
500
What is 7 893 293 - 650 000?
7 243 293
500
Round 83 to the nearest 1 000
0
500

Solve 780 003 - 5 389.

774 614

500

56 ___ 5.6

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