A)
320.55 - (6104.5/2.3)
320.55 - 2700
- (2700 - 320.55)
- 2400
Your answer doesn't take into account the SF I believe. SF are confusing though.
B)
[(285.3 x 10^5)-(1.200 x 10^-3)] x 2.8954
(28530000 - 0.001200) x 2.8954
28530000 x 2.8954
2.853 x 10^7 x 2.8954
8.261 x 10^7
2.861
C)
(0.0045 x 20 000.0)+(2813 x 12)
(4.5 x 10^-3 x 2.00000 x 10^4) + (3.4 x 10^4)
9.0 x 10^1 + 3.4 x 10^4
90 + 3400
3490
D)
863 x [1255-(3.45 x 108)]
863 x [1255 - 372]
863 x 883
7.62 x 10^5
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