简便运算：0.8*0.6*6.5*12.5 1.69*69-0.69*69 8.5*100.2 0.45*98
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/19 09:17:10
简便运算：0.8*0.6*6.5*12.51.69*69-0.69*698.5*100.20.45*98简便运算：0.8*0.6*6.5*12.51.69*69-0.69*698.5*100.20.4
简便运算：0.8*0.6*6.5*12.5 1.69*69-0.69*69 8.5*100.2 0.45*98
简便运算：0.8*0.6*6.5*12.5 1.69*69-0.69*69 8.5*100.2 0.45*98
简便运算：0.8*0.6*6.5*12.5 1.69*69-0.69*69 8.5*100.2 0.45*98
0.8*0.6*6.5*12.5
=（0.8*12.5）*（0.6*6.5）
=10*3.9
=39
1.69*69-0.69*69
=(1.69-0.69)*69
=1*69
=69
8.5*100.2
=8.5*(100+0.2)
=850+1.7
=851.7
0.45*98
=0.45*(100-2)
=0.45*100-0.45*2
=45-0.9
=44.1
0.8*0.6*6.5*12.5=0.8*12.5*0.6*6.5=10*0.6*6.5=39
1.69*69-0.69*69=69(1.69-0.69)=69
8.5*100.2=8.5*(100+0.2)=8.5*100+8.5*0.2=850+1.7=851.7
0.45*98=0.45*(100-2)=0.45*100-0.45*2=45-0.9=44.1
0.8*0.6*6.5*12.5
=0.8*12.5*0.6*6.5
=10*3.9
=39
自己做