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A. Answer this problem.
john and Carl are both working on the value of the expression:
2+4x3-6÷2. However, they have different answers. john answered 6, while Carl answered 11. Of the two students, who answered correctly?

B. Simplify each expression.

1. 9 + 2 x 7 - 4

2. 18 ÷ 3 x 2 + 4

3. 32 - (8 + 4) x 2

4. 3⁴ + 4

5. 6 x 4 ÷ 3 + 12

6. 5³ - 64 + 25​


Sagot :

Answer:

1. × >-13_2

2. 12

3.8

4.85

5.85

6.86

A.

Answer:

Carl

Step-by-step explanation:

Use MDAS:

2 + 4 x 3 - 6 ÷ 2

Multiplication

4 x 3 = 12

Division

6 ÷ 2

Addition

2 + 12 - 3

14 - 3

Subtraction

14 - 3 = 11

Therefore, Carl answered correctly.

B.

1. 9 + 2 x 7 - 4 = 9 + 14 - 4 = 23 - 4 = 19

2. 18 ÷ 3 x 2 + 4 = 18 ÷ 6 + 4 = 3 + 4 = 7

PEMDAS (parenthesis, exponential, multiplication, division, addition, subtraction)

3. 32 - (8 + 4) x 2 = 32 - 12 x 2 = 32 - 24 = 8

4. 3⁴ + 4 = 81 + 4 = 85

5. 6 x 4 ÷ 3 + 12 = 24 ÷ 3 + 12 = 8 + 12 = 20

6. 5³ - 64 + 25 = 125 - 64 + 25 = 125 - 89 = 36