addition and subtraction

There are 86 ants walking on the ground. 45 ants got squashed. How many ants are left?

I have $95. I spend $43. How many $ are left with me?

There are 45 dolphins in a pod. There are 32 dolphins in another pod. How many dolphins are there in all?

There are 62 chicks on a farm. 24 more chicks come along. How many chicks are there in total?

A shop has 78 cycles. It sells 58 cycles. How many cycles are left?

There are 52 bananas on one tree. There are 45 bananas on another tree. How many bananas altogether on both trees?