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.