简便运算(好的加200分)3.45-8.7+16.55-1.32.5*4.410.9-3.74+0.93.6*10.17.3*4.6+5.4*7.30.45*184.7/(4.7/3.2)3.6-3.6*0.812.3*99+12.34.2/(0.7+1.4)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 13:23:37
![简便运算(好的加200分)3.45-8.7+16.55-1.32.5*4.410.9-3.74+0.93.6*10.17.3*4.6+5.4*7.30.45*184.7/(4.7/3.2)3.6-3.6*0.812.3*99+12.34.2/(0.7+1.4)](/uploads/image/z/5506554-66-4.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%28%E5%A5%BD%E7%9A%84%E5%8A%A0200%E5%88%86%EF%BC%893.45-8.7%2B16.55-1.32.5%2A4.410.9-3.74%2B0.93.6%2A10.17.3%2A4.6%2B5.4%2A7.30.45%2A184.7%2F%284.7%2F3.2%293.6-3.6%2A0.812.3%2A99%2B12.34.2%2F%280.7%2B1.4%29)
简便运算(好的加200分)3.45-8.7+16.55-1.32.5*4.410.9-3.74+0.93.6*10.17.3*4.6+5.4*7.30.45*184.7/(4.7/3.2)3.6-3.6*0.812.3*99+12.34.2/(0.7+1.4)
简便运算(好的加200分)
3.45-8.7+16.55-1.3
2.5*4.4
10.9-3.74+0.9
3.6*10.1
7.3*4.6+5.4*7.3
0.45*18
4.7/(4.7/3.2)
3.6-3.6*0.8
12.3*99+12.3
4.2/(0.7+1.4)
简便运算(好的加200分)3.45-8.7+16.55-1.32.5*4.410.9-3.74+0.93.6*10.17.3*4.6+5.4*7.30.45*184.7/(4.7/3.2)3.6-3.6*0.812.3*99+12.34.2/(0.7+1.4)
原式=3.45+16.55-(8.7+1.3)=20-10=10
原式=2.5*(4+0.4)=10+1=11
原式=10.9+0.9-3.74=11.8-3.74=8.06
原式=3.6*(10+0.1)=36+0.36=36.36
原式=7.3*(4.6+5.4)=7.3*10=73
原式=0.45*(20-2)=9-0.9=8.1
原式=4.7*3.2/4.7=3.2
原式=3.6*(1-0.2)=3.6-0.72=2.88
原式=12.3*(99+1)=12.3*100=123
原式=4.2/2.1=2
3.45-8.7+16.55-1.3=(3.45+16.55)-(8.7+1.3)=20-10=10
2.5*4.4=2.5*(4+0.4)=2.5*4+2.5*0.4=10+1=11
10.9-3.74+0.9=(10.9-3.7)+(0.9-0.04)=7.2+0.86=8.06
3.6*10.1=3.6*(10+0.1)=3.6*10+3.6*0.1=36+0.36=...
全部展开
3.45-8.7+16.55-1.3=(3.45+16.55)-(8.7+1.3)=20-10=10
2.5*4.4=2.5*(4+0.4)=2.5*4+2.5*0.4=10+1=11
10.9-3.74+0.9=(10.9-3.7)+(0.9-0.04)=7.2+0.86=8.06
3.6*10.1=3.6*(10+0.1)=3.6*10+3.6*0.1=36+0.36=36.36
7.3*4.6+5.4*7.3=7.3*(4.6+5.4)=7.3*10=73
0.45*18=0.45*2*9=0.9*9=8.1
4.7/(4.7/3.2)=(4.7/4.7)*3.2=3.2
3.6-3.6*0.8=3.6*(1-0.8)=3.6*0.2=0.72
12.3*99+12.3=12.3*(99+1)=12.3*100=1230
4.2/(0.7+1.4)=4.2/(0.7+0.7*2)=4.2/(0.7*3)=4.2/0.7/3=6/3=2
收起