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(1) 75的20℅是多少?
=75 X 20/100
=75 / 5
=15

(2) 5打雞蛋,其中5℅是壞的,壞的雞蛋有多少隻?
=5打x12 x 5/100
=60/20
3隻

(3) 水桶的容量是50升.現已有水24℅,還可裝水多少升?
=50 - 50 x24/100
=50 - 12
=38升

(4)李先生忘記繳交電費,所以要多付電費的5℅作為附加費.已知電費是170元,他共要繳費多少元?
=170 + 170x5/100
=178.5元

1. 15
2. 3隻
3. 38升
4. 178.5元

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1)75*20%=15
2)5*12*5%=3
3)50*(1-24%)=38
150*105%=157.5

(1) 75的20℅是15.
75x20/100 = 15

(2) 5打雞蛋 = 5 x 12 = 60 隻,
5℅是壞的 = 60隻 x 5 / 100 = 3 隻.

(3) 50升 x (100 - 24)% = 50升x 76% = 38升

(4) 170元 + (170元 x 5%) = 178.5元

(1) 15

(2) 3隻 < (5x12) x 5% >

(3) 38升 < 50 x (1-24%) >

1)70x20%=15

(2)5x12x5%=3

(3)50-(50x24%)=38

(4)170+(170x5%)=178.5

(1.) 75 x 20%
= 75 x 20/100
=15

(2.) 5 x 12 x 5%
=60 x 5/100
=3隻

(3.) 50 x (1-24%)
=50 x (100%-24%)
=50 x 76%
=50 x 76/100
=38升

(4.)170 + 170 x 5%
=170 + 170 x 5/100
=170 + 8.5
=178.5元

1. 15
2. 3
3. 38
4. 178.5

(1) 75 * 20/100 = 15

(2) 5打=5*12=60 60*(5/100) = 3

(3) 50 * (24/100) = 12 50-12 = 38...答案是 38

(4) 170*(5/100) = 8.5 8.5+170 = 178.5 ..答案是178.5

(1)70x20%=15

(2)5x12x5%=3

(3)50-(50x24%)=38

(4)170+(170x5%)=178.5