I don't know how to do this question

I don't know how to do this question

This is a 6th grade math question.

a it at -80 feet, he swims up and jumps out of the water to the height of 15 feet

The book says the answer is 17 lb. I can't figure out how this can be. I see the problem as 8 + (-9) = -1. I don't see how both numbers are to be added. HELP!!!!

we are studying subtracting integers with fractions but i am not getting it. Even with the negatives

A -62 feet C 46 feet B -46 feet...

Subtracting Without Borrowing Subtraction without borrowing is slightly harder than simply subtracting one digit numbers, as the previous section showed, but it is similar in the sense that you are still going to be subtracting one digit numbers, you'll just be doing it more than once for the same problem. The problems will be lined up in columns, so you would subtract the column on the... read more

Subtraction Subtraction is the opposite of addition. Subtraction means you are taking away a certain amount (the amount youâ€™re subtracting). When we first think about subtraction, we can think about it as counting backwards (just like we counted forwards when we added numbers together). In this section, you will learn how to subtract one digit minus one digit numbers, how... read more

What is negative 1 minus negative 5?

I need to find out what is seven minus negative four