Using mental math to solve money problems (3rd-4th grade math)

I solve three different problems that involve finding totals and the change, using mental math. Math Mammoth Grade 3 curriculum https://www.mathmammoth.com/complete/... Shopping Game Practice making a total amount using coins and bills. https://www.mathmammoth.com/practice/... Practice making change with coins and bills in this online game. Several currencies are available. https://www.mathmammoth.com/practice/...