简便计算：43*67+33*33-7=?急,
问题描述：
简便计算：43*67+33*33-7=?急,
答
43*67+（43-10）*33 -7=43*100-330-7=3963
答
43*67+33*33-7
=（33+10）*67+33*33-7
=33*67+670+33*33-7
=33（67+33）+663
=3330+633
=3963
答
=33乘67+33乘33+10乘67-7=33乘（67+33）+670-7=3300+670-7=3970-7=963
答
43*67+33*33-7=43*（100-33）+33*33-7= 43*100-（43-33）*33-7=4300-330-7=3963
答
43*67+33*33-7
=（33+10）*67+33*33-7
=33*67+10*67+33*33-7
=33*（67+33）+670-7
=33*100+670-7
=3300+663
=3963
答
43*67+33*33-7
= 43*(100-33)+33*33-7
=4300-43*33+33*33-7
=4300-(43-33)*33-7
=4300-330-7
=3963