1. The scale of a map is 1 : 100 000
a) Find the distance on the map representing 2 km.
b) If a river on the map is 8 cm long, find the actual length of the river in km.
2. Mr. Cheungs income and expenses are in the ratio 7 : 5. If his monthly income is $14 000, what are his monthly expenses?
3. If we divide 126 into two parts in the ratio 4 : 5, how big is each part?
F.2 maths, 快!
2006-11-07 1:19 am
回答 (3)
2006-11-07 1:36 am
✔ 最佳答案
1a. The distance on the map=200000/100000
=2cm
1b. The actual length of the river
=8*100000/100000
=800000/100000
=8km
2. His monthly expenses
=14000*7/5
=98000/5
=$19600
3.The value of the smaller part
=126/(4+5)*4
=126/9*4
=14*4
=56
The value of the larger part
=126-56
=70
2006-11-07 2:53 am
1ａ 100 000/2*1000*100=100 000/200 000=0.5cm
ｂ 8*100 000=800 000cm=8km
2 14 000*(5/7)=$10 000
3 First part：126*4/(4+5)=14*4=56
Second part：126*5/(4+5)=14*5=70
The two parts are 56 and 70.
ｂ 8*100 000=800 000cm=8km
2 14 000*(5/7)=$10 000
3 First part：126*4/(4+5)=14*4=56
Second part：126*5/(4+5)=14*5=70
The two parts are 56 and 70.
2006-11-07 1:28 am
1a) because 1km=100000cm
therefor 2km=200000cm
(200000/100000)cm =2cm
1b) because 1cm = 100000cm=1km
therefore 8cm * 100000= 8000000=8km
2 ) 7:5 = 14000: 10000
His monthly expenses are $100000
3) 4:5 = 56:70
therefor 2km=200000cm
(200000/100000)cm =2cm
1b) because 1cm = 100000cm=1km
therefore 8cm * 100000= 8000000=8km
2 ) 7:5 = 14000: 10000
His monthly expenses are $100000
3) 4:5 = 56:70
參考: 自己!!!
收錄日期: 2021-04-12 22:41:50
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