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 723 100 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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