數學比題(超急)要詳細計算!!20點

5 '.' 4km =4X1000X100=400000cm
.'.2:400000
=>1:200000

6 500000cm=500000/1000/100=5km
.'.1cm:5km
hence,
6km = 1.2cm on map
4600m=4.6km =0.92cm on map

7 5X40000=200000cm=200000/1000/100=2km
8 1250000x12.1=15125000cm=15125000/1000/100=151.25km
9a 5800/100=5.8
.'.1cm:5.8m
9b 5.8x2.5=14.5m

10 你將你量的數X0.08/10 就等於答案

12 CD:GH =6:9
.'. =1:1.5
.'. EH= 7x1.5=10.5cm
EF=4x1.5=6cm
FG=5x1.5=7.5
'.' perimeter =EF+FG+GH+HE=10.5+6+7.5+9=33cm


14 (4.5x20000)/(1000x100)=4.5x0.2=0.9km
(2.8x20000)/(1000x100)=2.8x0.2=0.56km
.'. 0.9x0.56=0.504km^2