a) Perform the multiplication and division first, then the addition.
7 + 3·5 -4÷2 +3
= 7 +15 -2 +3
= 23
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b) Evaluate parentheses first, then the rest of it. The multiplication and division are done before the addition at the same level.
((7 +3)·5 -4)÷2 +3
= (10·5 -4)÷2 +3
= (50 -4)÷2 +3
= 46÷2 +3
= 23 +3
= 26
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<em>Additional comment</em>
An appropriate calculator can evaluate these for you. The Go.ogle calculator reliably follows the order of operations. You can use an asterisk (*) for multiplication with that calculator.
first you find the answer to 3 x __ = __ lets make the answer 24. That makes the other blank 8. Now subtract 24 from 184 and you should get 160. Divide 160 by 20 and you'll get how many set the customer ordered of twenty sandwiches. Multiply by twenty and you will get the whole amount they ordered.
