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5.7%1.9x0.2➗7.6怎么简便运算

12.6x7.6x2.32➗1.9➗1.4➗2.9如何用简便计算? 12.6x7.6x2.32➗1.9➗1.4➗2.9 =(12.6÷4)*(7.6÷1.9)*(2.32÷2.9) =3.15*4*0.8 =10.08

8.1/(0.9x0.3) =8.1/0.27 =810/27 =30 如有帮助请采纳, 如对本题有疑问可追问,Good luck!

2.1*5.1 *159.1➗0.7➗1.7➗3.7 =(2.1➗0.7)*(5.1 ➗1.7)*(159.1➗3.7) =3x3x43 =387

X➗1.9+18.2➗2.6=9.07 X➗1.9+7=9.07 X➗1.9=2.07 X=2.07×1.9 X=3.933

()+()=8++()+()=6||||138设:x+y=8,z+w=6,x+z=13,y+w=8则:x+y=8(1)x+z=13(2)z+w=6(3)y+w=8(4)(4)-(3):y-z=2(5)(1)-(2):y-z=-5(6)(5)(6)矛盾因此原方程组无解

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