Introduction to integer addition

Lessons

1. Write the addition statement that each diagram represents.
   +1:
   -1:
   
   1. 
   2. 
   3. 
2. Use integer addition to find the sum for the following situations.
   1. Matt has reviewed 4 chapters yesterday and studied another 3 today.
   2. Wendy had 12 skirts, but she donated 5 of them to a charity.
   3. The temperature of a summer day went up by 9 °C in the afternoon and went down by 4 °C at night.
   4. Aaron spent $11 for lunch and then lost $5 on the bus.
3. Identify the opposite of each integer.
   1. +2
   2. +10
   3. -6
   4. -5