Chapter Test
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Pay close attention to the order of operations.
- 40
-20-(- 5) * (- 2^2) For this exercise, this means evaluating the exponent first, the multiplication next, and finally the difference between the terms. Note that a product of two negative numbers is always a positive number.
Operation | Before Simplification | After Simplification |
---|---|---|
Calculate power | -20-(- 5) * (- 2^2) | -20-(- 5) * (- 4) |
(- a)(- b)=a* b | -20-( - 5) * ( - 4) | -20- 5 * 4 |
Multiply | -20- 5 * 4 | -20- 20 |
Subtract term | -20- 20 | - 40 |
The given expression equals - 40.