I. Perform Mixed Arithmetic Operations
How do we determine the result of: 18 + 15 – 7 = ...
Example:
Answer:
Let's do the sequence operation from the left
18 + 15 – 7 = (18 + 15) – 7
= 33 – 7
= 26
So, 18 + 15 – 7 = 26
Try to practice with the example below:
45 – 21 + 16 = ... .
Answer:
45 – 21 + 16 = (45 – 21) + 16
= ... + 16 = ...
So 45 – 21 + 16 = 40
J. Story Problems Related to Integers
The air temperature during the day is 24°C. Meanwhile, at night the temperature drops to 8°C. What is the temperature at night?
Answer:
An 8°C drop means the temperature drops by 8°C.
So, the problem above can be written 24°C – 8°C = 16°C.
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