Question

Janna has 34 pennies. Mandy has 48 pennies. Mandy says they have 72

pennies in all. What should Mandy do to fix her mistake?
Mandy should add the tens before she adds the ones.
Mandy should subtract instead of adding.
Mandy should add a hundred after she regroups the tens.
Mandy should add a ten after she regroups the ones.

Answer 1

Mandy should add a ten after she regroups the ones

Explanation:

48 + 34 = 82 pennies

Answer 2

Mandy should add the tens before she adds the ones.

Explanation:

There are no other good answers and the correct answer is 82 pennies.