Estimate the Sum and Difference Worksheets
Estimate the sums and differences in these worksheets by rounding each number to the nearest ten, hundred, thousand or hundred thousand. Frontend estimation method may also be used to estimate the value in some of the worksheets.

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Estimate to the nearest ten
Estimate the value by rounding each number to the nearest ten. Level 1 and Level 2 have worksheets to estimate the sum and difference respectively. Level 3 contains mixed operations.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 3:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Estimate to the nearest hundred
Round each number to the nearest hundred and estimate the sum and difference in all the worksheets.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 3:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Estimate to the nearest thousand
Estimate the sum or difference by rounding the numbers to the nearest thousand. Level 3 has multidigit numbers to perform mixed operations.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 3:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Estimate the large numbers
Each level has three exclusive worksheets to estimate values by rounding each number to its nearest ten thousand and million.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 3:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Front end estimation: Mixed Review
Use frontend estimation method to round the given numbers and thereby find the sum and difference in each worksheet. Round the numbers to the nearest hundred in level 1 and to the nearest ten thousand in level 2.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Estimating sums: Three addends
Round the three addends to the nearest ten in level 1 and to the nearest thousand in level 2 and estimate their sum.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Estimate the value
Perform numerical operations and estimate the value in each problem. Round each number to the nearest ten in level 1 and to the nearest hundred in level 2.
Level 1:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All
Level 2:
Sheet 1  Sheet 2  Sheet 3  Grab 'em All