Estimate Fractions and Mixed Numbers Using Benchmark Numbers

Find about how many or about how much, often by using rounding or benchmarks.

• benchmarks

• simplify

• estimate

• simplify

To change a number to a nearby number.

• simplify

• equivalent fraction

• estimate

• round

• 2

• 3

• 3  1/2

• 4

What benchmark fraction is closest to 2  5/6?

• 2

• 2 1/2

• 3

• 3 1/2

• Yes; the actual difference is not less than 1.

• Yes; he did not use the correct benchmarks to estimate the difference.

• No; he correctly used common denominators to estimate the difference.

• No; the amount he subtracted is greater than the benchmark, so the actual difference will be less.

A fraction you compare other fractions with is called a:

• unit fraction

• benchmark fraction

• equivalent fraction

• simplest form

This shows part of a whole.

• fraction

• whole number