化简和用简便方法计算

来源：百度知道 编辑：UC知道 时间：2024/06/07 01:00:14
化简 6A+13A 用简便方法计算 25.25*0.65*4除0.65

0.93*1.01 6.24-3.34-2.66
8A-(5A+8)
0.485*102-48.5 4.4+4.4*12+1385.6

6X-28-2.5X+30.5

(5X+7)-(4X+0.18)
A是3.3,B是A的30倍,C是B的10倍,D是C的10倍,求d+6乘C+6乘B+20乘A的直
这个回答了,在送30分

6A+13A=19A;

25.25*0.65*4/0.65=25.25*4=101;

0.93*1.01=0.93*(1+0.1)=0.93+0.093=0.9393;

6.24-3.34-2.66=6.24-(3.34+2.66)=6.24-6=0.24;

8A-(5A+8)=8A-5A-8=3A-8;

0.485*102-48.5=0.485*(100+2)-48.5=48.5+0.97-48.5=0.97;

4.4+4.4*12+1385.6 =4.4*(1+12)+1385.6=4.4*13+1385.6=57.2+1385.6=1442.8;

6X-28-2.5X+30.5=(6-2.5)A+30.5-28=3.5A+2.5;

(5X+7)-(4X+0.18)=5X+7-4X-0.18=X+6.82.

A=3.3,B=30A=99,C=10B=990,D=10C=9900,
D+6C+6B+20A
=9900+990*6+99*6+3.3*20
=9900+5940+594+66
=9900+6600
=16500.

6A+13A=19A

用简便方法计算 25.25*0.65*4/0.65
=(25.25*4)*0.65/0.65
=25.25*4
=(25+0.25)*4
=25*4+0.25*4
=100+1
=101

0.93*1.01=0.93*(1+0.01)=0.93*1+0.93*0.01=0.93+0.0093=0.9393

6.24-3.34-2.66=6.24-(3.34+2.66)=6.24-6=0.24

8A-(5A+8)=8A-5A-8=3A-8

0.485*102-48.5
=0.485*(100+2)-48.5
=0.485*100+0.485*2-48.5
=48