Reasonable Sums & Differences Using Benchmark Fractions

T.I.P.S.

Students must be able to determine and justify whether or not sums and differences of fractions are reasonable. They will use benchmarks of 0, ¼, ½, ¾, and 1.

Example

Mr. Mills is teaching his students to think about the problems they have to solve before doing any computation. His purpose is to help them recognize whether or not the actual answers they get are reasonable. The students have been asked to decide if 1 ¾ is a reasonable result when adding 7/12 and 11/12. Explain why you think it is or is not a reasonable result. HintPossible Solution 

TEKS

Supporting Standard 4.3 Number and operations. The student applies mathematical process standards to represent and generate fractions to solve problems.
(F) valuate the reasonableness of sums and differences of fractions using benchmark fractions 0, 1/4, 1/2, 3/4, and 1, referring to the same whole

Feedback

Click here to submit feedback.