Subtraction
Addition Patterns
Rounding
Estimate by Rounding
Addition
100

56-13=

What is 43?

100

1 more than 75

What is 76?

100

Round to the nearest 10. 

48

What is 50?

100

Estimate by rounding to the nearest 10. 

75 + 12

What is 90?

100

192 + 464

What is 656?

200

95-28=

What is 67?

200

2,343; 3,343; 4,343; 5,343 

Pattern: Adding ____

What is 1,000?

200

Round to the nearest 100. 

345

What is 300?

200

Round to the tens place.

634 + 788

What is 1,420?

200

387 + 251

What is 638?

300

543-78=

What is 465?

300

495, 505, 515, ___, ___, 545 

Pattern: Adding ____

What is 525, 535, and 10's?

300

Round to the nearest 10.

 676

What is 680?

300

Estimate by rounding to the nearest hundred to find the sum. 

305 + 853

What is 1,200?

300

834 + 486

What is 1320?

400

1025-318=

What is 707?

400

10 more than 733

100 more than 723

1,000 more than 723

What is 733, 

           823, 

          1,723?

400

Round to the nearest 100.

 3,538

What is 3,500?

400

Estimate by rounding to the nearest 100 to find the sum. 

632 + 583

What is 1,200?

400

6,345 + 2,956

What is 9301?

500

4162-395=

What is 3767?

500

1,000 more than 9,876

100 more than 9,876

10 more than 9,876

1 more than 9,876

What is 10,876; 

9,976; 

9,886; 

9,877?

500

Round to the nearest 10. 

Then round to the nearest 100.

 8,793

What is 8,790? 

What is 8,800?

500

Estimate by rounding to the nearest ten to find the sum. 

578 + 409

What is 990?

500

7,895 + 3,647

What is 11,542?

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