N3D5TNp21

Answer to Problem 21:

$355.68 is about $360. $360 ÷ 6 is $60. So Ben earned about $60 per week.

TEACHER NOTES:

Estimation serves as an important companion to computation. It provides the tool for judging the reasonableness of calculator, mental and paper-and-pencil computations. Being able to compute exact answers does not automatically lead to an ability to estimate and judge the reasonableness of an answer. Students in grades 3–5 will need to be encouraged to routinely reflect on the size of anticipated solutions.[1]