Money and measurement math problems

2 problems with worked solutions.

№ 1 · Money and measurement · Grade 2

Lena had 100 tenge. She bought three pencils for 18 tenge each. How many tenge does Lena have left?

№ 2 · Money and measurement · Grade 3

A class bought four notebooks at 125 tenge each and three pens at 80 tenge each. How many tenge did the entire purchase cost?