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Addition/Subtraction
Rounding/Estimation
Place Value
100
435 + 982 = ?
1,417
100
Round this number to the nearest thousand: 2,756
3,000
100
In the following number, which digit is in the hundreds place: 5,126,308
3
200
572 + 318 = ?
890
200
Round this number to the nearest 10 thousand: 491,710
490,000
200
In the following number which digit is in the hundred-thousands place? 4,589,231
5
300
564 + 279 = ?
843
300
Make a ballpark estimate by rounding each number to the 10's place then adding: 46 + 29 =
50 + 30 = 80
300
Write the following number in word form: 432,113
Four hundred thirty-two thousand, one hundred thirteen
400
624 - 198 = ?
426
400
Make a ballpark estimate by rounding each number to the 100's place then adding: 486 + 719 =
500 + 700 = 1,200
400
Write the following number in expanded form: 26,734
20,000 + 6,000 + 700 + 30 + 4
500
8,324 - 2,973 = ?
5,351
500
Make a ballpark estimate by rounding each number to the 100's place then subtracting: 937 - 462 =
900 - 500 = 400
500
Look at the following number: 4,012. What would happen if you wrote the number without the 0? Why is it important to include "0" in numbers.
The number would be 412. You need zeros to fill place value columns that do not have value otherwise the value of the number will change.