✔ 最佳答案
第一張圖
9)B [得a,u,t 3個變數(variables)]
10) A [ 6h x 3k / 4m = 18hk/4m = 9hk/2m]
11) D [12-x=-4 => 12-(-4)=x => x=16]
12) D [3(x-4)=21 => x-4=7 => x=11]
13) C [2(a-b)^2 = 2x6^2 = 72]
14) B [320x35% =320x0.35 = 112]
15) A [將32 , 8/27 同2/7化成小數再比較]
16) C [18/(12+18) x 100% =18/30 x100% =60%]
17) D [300/(1-25%) = 300/75% =400 ]
第二張圖
18) A [175x(1-20%) = 175x80% = 140 ]
19) A [ (5x12 - 51) / (5x12) x100% = 9/60 =15% ]
20) B
21) D
22) D
23) D
24) A [11x18/2 = 99]
25) C
第三張圖
26) B
27) D
28) C
29) A [270-135-72 =63 ]
30) D [135/360 x100% = 37.5%]
第四張圖
20) 18 x 12 - [12x(18-8-4)/2] - [(6+8)x (12-5)/2]= 131 cm^2
21) 6x3 = 18 edges 6x2 = 12 vertices
22) (750 -300) /3 = 150
23) 10x18x8 + 5x8/2 x18 = 1440+ 360 =1800