1240*3.4+760*8.2+1.24*7700+0.76*2900怎样用简便方法计算?
问题描述:
1240*3.4+760*8.2+1.24*7700+0.76*2900怎样用简便方法计算?
答
1240*3.4+760*8.2+1.24*7700+0.76*2900
=124*34+124*77+76*82+76*29
=124*(34+77)+76*(82+29)
=124*101+76*101
=101*(124+76)
=101*200
=20200