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Estimate the value of the expression by rounding each number to the given place value. 68 – 29; tens A. 30 B. 35 C. 40 D. 50

Estimate the value of the expression by rounding each number to the given place value. 68 – 29; tens A. 30 B. 35 C. 40 D. 50
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Estimate the value of the expression by rounding each number to the given place value. 68 – 29; tens A. 30 B. 35 C. 40 D. 50

User Nikita Koksharov
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68 is rounded to 70. 29 is rounded to 30. This leaves you with 70 - 30, which equals 40. Which is letter D. 
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