4.025里面有多少个2?
的有关信息介绍如下:解:4.025里面有( 2.0125 )个2
∵已知需求出4.025里面有多少个2
1个2 = 1 × 2 = 2
2个2 = 2 + 2 = 2 × 2 = 4
∴设这个数为x
x × 2 = 4.025
2x = (4×1000+ 25)/1000
2x = 4025/1000
2x = 161/40
x = 161/40 ÷ 2
x = 161/40 × 1/2
x = 161/80
∴x = 2.0125
答:4.025里面有2.0125个2