At night the air temperature is -5 ° С. In the morning the temperature increased by 7 ° С

At night the air temperature is -5 ° С. In the morning the temperature increased by 7 ° С, and by the evening dropped by 3 ° С. What was the temperature by the evening?

Brief notation of the condition of the problem:

Was – -5 ° С;

Increased – by 7 ° С;

Lowered – by 3 ° С;

What has become?

Decision:

1) Find the air temperature in the morning. To do this, add a number to the air temperature at night, showing how much the temperature has increased by the morning:

-5 + 7 = 2 (° С);

To find what the temperature has become by the evening, you need to subtract the number from the temperature in the morning that shows how much the temperature dropped by the evening:

2) 2 – 3 = -1 (° С);

Answer: -1 ° С