percentages math question_p.6
plz hep me to do the questions .Thx!If you do not know the answer,plz answer no!Thx!
1.Find the values of the following:
(a) 6%-3%
(b) 2+20%
(c) 180(1+5%)
回答 (3)
When you are going to do such %age problem, bear in mind that % itself is a number, equals to 1/100 or 0.01
a) 6% - 3% means 6x0.01 - 3x0.01 = 0.06 - 0.03 = 0.03 = 3 x 0.01 = 3%
got it?
for the following, follow the same procedure: change % to number and then change the number to %. Finish!
(a)
6%-3%
=3% or 0.03
(b)
2+20%
=220% or 2.2
(c)
180(1+5%)
=180x(1.05)
=18900% or 189
參考: 心算
a)100
b)110
c)1080
參考: 中學果D計算機...
收錄日期: 2021-04-12 20:36:52
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