Mental Math
Estimate each Sum or Difference
Subtracting Across 0's
Random
Random
100

Find 4,971 + 2,429. Use mental math. 

7,400

100

Estimate each sum of difference. 8,352 - 3,421

5,000

100

Find 9,000 - 6,280.

2,720

100

Cheeseburgers Sold 

Friday: 4,352

Saturday: 1,009

Sunday: 2,877

Estimate the number of cheeseburgers sold by rounding each number to the nearest thousands and find the sum. 

8,000

100

square root of 64

8

200

Find 1,089 - 961. Use mental math

128

200

Estimate each sum or difference. 55,748 - 28,392

90,000

200

Find 100- 78.

22

200

Cheeseburgers Sold 

Friday: 4,352

Saturday: 1,009

Sunday: 2,877

Write an equation to find how many cheeseburgers were sold

4,352 + 1,009 + 2,877 = 8,238

200

 write the expanded form of 63

6 + 6 + 6

300

Find 47,676 - 16,521 Use mental math. 

31, 155

300

Estimate each sum or difference. 995,275 + 4,921

1,000,000

300

Find 50,000 - 14,567.

35,433
300

Enter the missing digit to complete the subtraction.         10,456

-    6, 452

_____________

      __,___ 04

4, 0 

300

square root of 49

7

400

Find 5,342 + 1,999. Use mental math.

7,341

400

Estimate each sum or difference. 17,586 - 9,483 

9,000

400

Find 1,000 - 435

565

400

Complete the equation to make it true. 

12,869 + 16,319 = ______ + 15,402

13,789

400

Evaluate 54

625

500

Find 92,425 + 31,625. Use mental math

124,050

500

Estimate each sum or difference. 823,725 + 44,851

860,000

500

Estimate each sum or difference. 300,000 - 17,987

282,013

500

Find the difference. 9,606- 939


8,667

500

square root of 9

3

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