要简便方法计算.
问题描述：
要简便方法计算.
0.25*0.62*4= （2.8+0.5）*2= 104*2.5= 48*1.25=
答
0.25*0.62*4
=1/4 *0.62*4
=1/4 *4*0.62
=0.62
（2.8+0.5）*2
=2.8 *2+0.5*2
=5.6+1
=6.6
104*2.5
=104*5÷2
=520÷2
=260
48*1.25
=48*10÷8
=48÷8*10
=6*10
=60