5×15.6+4.5×3.4+4.5+怎么简便计算?
正确题的简简计算法:4.5×15.6+4.5×3.4+4.5
=4.5*(15.6+3.4+1)
=4.5*20
=90
答:5*15.6+4.5*3.4+4.5
=5*15.6+4.5*(3.4+1)
=5*15.6+4.5*4.4
=5*15.6+(5-0.5)*4.4
=5*15.6+5*4.4-0.5*4.4
=5*(15.6+4.4)-2.2
=5*20-2.2
=100-2.2
=97.8
所以答案是97.8。
5×15.6+4.5×3.4+4.5
=5×15.6+4.5×(3.4+1)
=5×15.6+5×4.4-0.5×4.4
=5×(15.6+4.4)-2.2
=5×20-2.2
=100-2.2
=97.8
5×15.6+4.5×3.4+4.5的简便计算方法为(4.5+0.5)×15.6+4.5×3.4+4.5
=4.5×(15.6+3.4+1)+0.5Ⅹ15.6
=4.5×20+7.8
=97.8