搜搜做题作业网7.5*23+31*2.5简便运算 0.79*0.46+7.9*0.24+11.4*0.079的简便运算
来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：数学作业 时间：2024/07/01 11:18:43
7.5*23+31*2.5简便运算 0.79*0.46+7.9*0.24+11.4*0.079的简便运算
7.5*23+31*2.5
=2.5*3*23+31*2.5
=2.5*69+31*2.5
=2.5*(69+31)
=2.5*100=250
0.79*0.46+7.9*0.24+11.4*0.079
=0.79*0.46+0.79*2.4+0.79*1.14
=0.79*(0.46+2.4+1.14)
=0.79*4
=3.16
=2.5*3*23+31*2.5
=2.5*69+31*2.5
=2.5*(69+31)
=2.5*100=250
0.79*0.46+7.9*0.24+11.4*0.079
=0.79*0.46+0.79*2.4+0.79*1.14
=0.79*(0.46+2.4+1.14)
=0.79*4
=3.16