Can someone please help me with these problems?

Mathematics

2 answers:

adoni [48]3 years ago

5 0

17. The student did the exponent operation first. 3^2=9. The student is correct.
18. The student made a mistake in the second step by subtrating, when he was supposed to multiply 8×2.
19. Correct asnwer is 16:
23-8×2+3^2=
=23-8×2+9=
=23-16+9=
=7+9=
=16

anzhelika [568]3 years ago

4 0

17. Subtraction. According to the order of operations, he should've done the exponent of 3 first.

18. He then did 15×2. According to the order of operations, he should've done the multiplication of 8×2, since, if there are only multiplication and/or division left, you work left to right. He isn't correct.

19. 16, I think, I did it in my head.

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