Adding And Subtracting Decimal Numbers
Estimating Sums and Differences
Subtraction Facts
Addition Facts
Rounding Whole Numbers and Decimals
100

0.82 + 4.21 = 

5.03

100

Estimate to the nearest tens place and find the answer.

92 - 13

What is 90-10 = 80

100

8,567-5,432

What is 3,135?

100

3,164 + 2,918

What is 6,082?

100

Round the number to the underlined digit

677

700

200

45.09 + 2.005

47.095

200

Estimate to the nearest ten and find the answer 55 + 32

60 + 30 = 90

200
4,582-2,349
What is 2,233?
200

18,512 + 15,232

What is 33,744

200

Round the number to the underlined digit

12,064


12,100

300

42.89 + 8.2 =

51.09

300

Estimate to the nearest hundred and find the answer:

345 + 468 = 

What is 300 + 500 = 800

300

8,604 - 5,436

What is 3,168?

300

2,632 + 3,489

What is 6,121

300

Round the number to the underlined digit

748,397

749,000

400

$20.60 - $14.35 = 

$6.25

400

About how many tickets were sold all together to the nearest hundred? 

Thursday = 320 

Friday= 282 

Saturday = 375

What is 1,000?

400
5892-1245
What is 4647?
400

38,261 + 27,614

What is 65,875

400

Round the number to the underlined digit

75.8

80.0

500

15.03 - 4.121 = 

10.909

500

Ms. Young's class collected 1,200 cans for a food drive.  Ms. Vetere's class collected 1,600 cans for a food drive.  About how many cans were collected to the nearest thousand?

What is 3,000?

500
558 -32
What is 526
500

123,782 + 321,691

What is 445,473

500

Round the number to the underlined digit

738.29

738.30