Question

Jackson gave lena this expression to evaluate: 14(8+12) lena said that to evaluate the expression was simple; just multiply the factor 14 and 20. Jackson told lena she was wrong. He solved it by finding the product of 14 and 8, then adding that to the product of 14 and 12 evaluate the expression using each student's method

Answer 1

Using lena's method:

`14(8+12)=14\cdot(20)=280`

Using Jackson's method:

`14(8+12)=14\cdot8+14\cdot12=112+168=280`