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0.65+19.5*6.5简便计算

解:19×0.5×6 =19x(0.5x6) =19x3 =57

6*(19*5) =6*5*19 =30*19 =570

6×(19×5)用简便计算 6×(19×5) =6×19×5 =6×5×19 =30×19 =570

g

0.65+19.9×6.5 =0.1×6.5+19.9×6.5 =(0.1+19.9)×6.5 =20×6.5 =130

19.6-(5+32)×2 =19.6-5×2-32×2 =-(64-9.6) =-(64-10+0.4) =-54.4

一有十九分之七+5/6*8/19的简便运算 解: 1又19分之7+5/6*8/19 =19分之26+19分之(5/6*8) =19分之(26+20/3) =19分之(98/3) =98/57

19.5-6.93-3.07+0.5 =19.5+0.5-6.93-3.07 =(19.5+0.5)-(6.93+3.07) =20-10 =10 ——————————————

(5/6+2/9)×4/5÷19/20 =19/18×4/5×20/19 =(19/18×20/19)×4/5 =10/9×4/5 =8/9

5/19×1/6+4/19×5/9+5/18×7/19 =5/19×1/6+5/19×4/9+5/19×7/18 =5/19×(1/6+4/9+7/18) =5/19×(3/18+8/18+7/18) =5/19×1 =5/19 明白请采纳,有疑问请追问! 有新问题请求助,谢谢!

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