Question

、写出分母为2、4、5、8、10、16、20、25的最简真分数,并化成小数和百分数？

Answer 1

分母是2的最简分数有1/2=0.5=50%
分母是4的最简分数有1/4=0.25=25%,3/4=0.75=75%
分母是5的最简分数有1/5=0.2=20%,2/5=0.4=40%,3/5=0.6=60%,4/5=0.8=80%
分母是8的最简分数有1/8=0.125=12.5%，3/8=0.375=37.5%,5/8=0.625=62.5%,7/8=0.875=87.5%
分母是10的最简分数有1/10=0.1=10%,3/10=0.3=30%,7/10=0.7=70%,9/10=0.9=90%
分母是16的最简分数有1/16=0.0625=6.25%,3/16=0.1875=18.75=18.75%,5/16=0.3125=31.25%7/16=0.4375=43.75%,9/16=0.5625=56.25%,11/16=0.6875=68.75%.13/16=0.8125=81.25%.15/16=0.9375=93.75%
分母是20的最简分数有1/20=0.05=5%，3/20=0.15=15%,7/20=0.35=35%,9/20=0.45=45%,11/20=0.55=55%,13/20=0.65=65%,17/20=0.85=85%,19/20=0.95=95%
分母是25的最简分数有1/25，2/25，3/25，4/25，6/25，7/25，8/25，9/25，11/25，12/25，13/25，14/25，15/25，16/25，17/25，18/25，19/25，21/25，22/25，23/25，24/25

Answer 2

答：根据题意得
1/2＝0.5＝50%，
1/4＝0.25＝25%
3/4＝0.75＝75%
1/5＝0.2＝20%，
2/5＝0.4＝40%
3/5＝0.6＝60%
4/5＝0.8＝80%
1/8＝0.125＝12.5%
3/8＝0.375＝37.5%
5/8＝0.625＝62.5%
7/8＝0.875＝87.5%
1/10＝0.1＝10%
3/10＝0.3＝30%
7/10=0.7=70%
9/10=0.9=90%
1/16=0.0625=6.25%
3/16=0.1875=18.75%
5/16=0.3125=31.25%
7/16=0.4375=43.75%
9/16=0.5625=56.25%
11/16=0.6875=68.75%
13/16=0.8125=81.25%
15/16=0.9375=93.75%
1/20=0.05=5%
3/20=0.15=15%
7/20=0.35=35%
9/20=0.45=45%
11/20=0.55=55%
13/20=0.65=65%
17/20=0.85=85%
19/20=0.95=95%
1/25=0.04=4%
2/25=0.08=8%
3/25=0.12=12%
4/25=0.16=16%
6/25=0.24=24%
7/25=0.28=28%
8/25=0.32=32%
9/25=0.36=36%
11/25=0.44=44%
12/25=0.48=48%
13/25=0.52=52%
14/25=0.56=56%
16/25=0.64=64%
17/25=0.68=68%
18/25=0.72=72%
19/25=0.76=76%
21/25=0.84=84%
22/250.88=88%
23/25=0.92=92%
24/25=0.96=96%。

Answer 3

1/2=0.5=50%
1/4=0.25=25%
3/4=0.75=75%
1/5=0.2=20%
2/5=0.4=40%
3/5=0.6=60%
4/5=0.8=80%
1/8=0.125=12.5%
3/8=0.375=37.5%
5/8=0.625=62.5%
7/8=0.875=87.5%
1/10=0.1=10%
3/10=0.3=30%
7/10=0.7=70%
9/10=0.9=90%
……

Answer 4

1/2
1/4 3/4
1/5 2/5 3/5 4/5
1/8 3/8 5/8 7/8
1/10 3/10 7/10 9/10
1/16 3/16 5/16 7/16 9/16 11/16 13/16 15/16
1/20 3/20 7/20 9/20 11//20 13/20 17/20 19/20
1/25 2/25 3/25 4/25 6/25 7/25 8/25 9/25 11/25 12/25 13/25 14/25 16/25 17/25 18/25 19/25 21/25 22/25 23/25 24/25