1)when adding two negative numbers, the absolute value of the numbers and keep the negative sign.
add
subtract
change
2)when adding two different signed numbers, the absolute values of the numbers and keep the sign of the number with the larger absolute value.
add
subtract
change
3)when subtracting, change the subtraction to addition and the sign of the number being taken away
add
subtract
change
4)which of the following would be a good estimate for -7.94 - 2.31?
-9
-5
-6
-10