把下面各比化成最简单的整数比 2/5:3/4 0.45:35 18:15 3/5:0.21 6/0.5 24:0.8
问题描述:
把下面各比化成最简单的整数比 2/5:3/4 0.45:35 18:15 3/5:0.21 6/0.5 24:0.8
答
2/5:3/4 =8:15
0.45:35 =9:700
18:15 =6:5
3/5:0.21 =20:7
6/0.5 =12:1
24:0.8=30:1过程2/5:3/4 =(2/5×20):(3/4×20)=8:150.45:35 =45:3500=9:70018:15 =(18÷3):(15÷3)=6:53/5:0.21 =0.6:0.21=60:21=20:76/0.5 =(6×2):(0.5×2)=12:124:0.8=240:8=30:1求比值 1/4:2/5 0.35:2/51/ 2:8.4 3.75:505 1/8:1.2515:451/4:2/5=1/4÷2/5=5/8 0.35:2/5=0.35÷2/5= 7/81/ 2:8.4=1/2÷8.4= 5/84 3.75:505 =3.75÷505=3/4041/8:1.25=1/8÷5/4=1/1015:45=15÷45=1/33.75:55 麻烦你了3.75:55 =3.75÷55=3/44