解:1/4-1/10等于( 3/20 ),【即等于0.15】
∵已知需求出1/4-1/10等于几
∴1/4 - 1/10
= (1×5)/(4×5)- (1×2)/(10×2)
= 5/20 - 2/20
= (5-2)/20
= 3/20
= 0.15
答:1/4-1/10等于3/20,【即等于0.15】
1/4-1/10等于3/20
1/4-1/10
=5/20-2/20
=3/20
1/4=0.25,,,,1/10=0.1,,,,
=0.25-0.1=0.15=15/100=3/20。