Okay. You would subtract because if a problem asks you Jill walk 0.5 to school and 0.3 back to home "HOW MUCH" does she need to walk to get home which will equal to 0.2 so see
"How much ... all together ?" usually means add. "How much ... left ?" usually means subtract.
more the yours means to take away
wich one
subtraction
does how many mean add or subtract
subtract
it means to subtract
well you need to find out what the problem is befor u answer it.
Subtract.
deposit = add withdraw = subtract
add
you have to subtract because when you say hw many than you have to add when you say how much you have to subtract.