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：学生作业帮助网 编辑：六六作业网 时间：2025/01/30 06:12:43
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简便运算0.79*0.46+7.9*0.24+11.4*0.079的简便

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

7.5*23+31*2.5=2.5*3*23+2.5*31=2.5*69+2.5*31=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+1.14+2.4）=0.79*4=3.16

（1）
7.5*23+31*2.5
=7.5*23+23*2.5+8*2.5
=23*（7.5+2.5）+20
=230+20
=250
（2）0.79*0.46+7.9*0.24+11.4*0.079
=0.79*（0.46+2.4+1.14）
=0.79*4
=3.16

甲、乙两数的差是7.02，甲数的小数点向右移动一位就等于乙数。甲、乙两数分别是多少？？？

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 简算7.5*23+31*2.5要求简便运算,7.5乘23加31乘2.5 7.5*27+19*2.5的简便运算 简便运算7.5*83-2.5*9 9.8×2.5 简便运算, 7.5*99.9+0.75简便运算 10.1乘7.5简便运算 1.6×7.5×1.25简便运算 101×23-23简便运算 2.5*102-55简便运算 2400÷2.5简便运算 1.25×0.64×2.5 简便运算 2.5×0.32×12.5简便运算 2.84÷2.5简便运算 2.5×40.1的简便运算 2.84÷2.5简便运算 39*23/38简便运算 111* 23如何简便运算