Question

1. Simplify:
a. 18- 9 x (-4) - 3 + 10 x 2​

Answer 1

The answer is 71

Explanation:

** Follow the PEMDAS (Order Of Operations)

1. Multiply and divide from left to right

9(-4) = -36

**** This leaves you with 18-(-36)-3+10*2

2. Multiply and divide from left to right

10*2=20

**** This leaves you with 18-(-36)-3+20

3. Add and subtract from left to right

18-(-36)-3+20=71

****** And your final answer is 71!

Answer 2

The answer is 50.

Explanation:

We should use the "BODMAS" rule in solving problems like this.

If an expression contains B-(brackets), we have to first solve the bracket followed by O-(orders or power), then D-(division), M-(Multiplication, A-(addition) and S-(subtraction).

a. 18 - 9 x (-4) ÷ 3 + 10 x 2

= 18 - 9 x (-4/3) + 10 x 2

= 18 - (-12) + 10 x 2

= 18 - (-12) + 20

= 18 + 12 + 20

= 50

[18 - 9 x (-4) ÷ 3 + 10 x 2] = 50