Gena wants to estimate the quotient of negative 21 point 8 7 divided by 4 point 7 9 Which expression shows the estimate using front-end estimation?

Front-end estimation keeps the leading digit of each number and changes the remaining digits to zero. So −21.87 is estimated as −20, and 4.79 is estimated as 4. The resulting expression is −20 ÷ 4, choice A.

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