Evaluate each expression. See Example.
89 – 47 + 6
EXAMPLE
Evaluate: 27 − 16 + 5
Strategy We will perform the subtraction first and add 5 to that result.
WHY The operations of addition and subtraction must be performed as they occur from left to right.
Solution
We will write the steps of the solution in horizontal form.
Caution! When making the calculation in Example 10, we must perform the subtraction first. If the addition is done first, we get the incorrect answer 6.
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