[計量] The water level in a tank is ...
請教這一題的計量要選什麼答案
先謝謝了!
1.The water level in a tank is lowered by 6 inches,then raised by 8 inches,and
then lowered by 4 inches.If the water level was x inches before the changes in
level, which of the following represents the water level in inches, after the c
hange?
(A)x-1 1/2
(B)x+1 1/2
(C)x-6 1/2
(D)x+6 1/2
(E)x-18 1/2
我直接算是 x+(-6+8-4) = x-2
選項沒有這個
較接近的是 A
答案也是 A
只是我不知要如何得出 x-1 1/2
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10/24 08:34, , 1F
10/24 08:34, 1F