Jason is solving a homework problem. arianna buys 5 boxes of gronola bars. each box contains 12 granola bars. arianna eats 4 bars. jason writes a numerical expression, (12-4)x5 has a mistake. explain jason's mistake. then write and expression to show how many granola bars are left, and then solve it

The expression should be (5*12)-4. That is Jason's mistake

Step-by-step explanation:

Arianna has five boxes of granola bars and each box has twelve granola bars, so in total she has:

5*12 = 60 granola bars.

But she eats four bars, so to know how many bars she has, in the end, we have to subtract four bars from the total of granola bars she has:

60-4 = 56 granola bars

The expression is (5*12) - 4

Jason's mistake is that his expression says that she is eating four granola bars from each box: (12-4)*5 = 40 and this is wrong.