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Estimate the sum. Round each number to the nearest whole number, then add.
Estimate the difference. Round each number to the nearest whole number, then subtract.
Estimate the difference. Round each number to the nearest whole number, then subtract.
Estimate the difference. Round each number to the nearest whole number, then subtract.
Estimate the sum. Round each number to the nearest whole number, then add.
Estimate the sum. Round each number to the nearest whole number, then add.
Estimate the difference. Round each number to the nearest whole number, then subtract.
Estimate the sum. Round each number to the nearest whole number, then add.
Estimate the sum. Round each number to the nearest whole number, then add.
Estimate the difference. Round each number to the nearest whole number, then subtract.
Estimate the sum. Round each number to the nearest whole number, then add.