Tính nhanh:
9*3*1001+0,9*30000+30*899,9*9
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Tính nhanh:
9*3*1001+9,9*30000+30*899,9*9
Bài này hơi rối ha ^ ^
9.3.1001+9,9.30000+ 30.899,9.9
\(=9.3.1001+9.1,1.30.1000+30.899,9.9\)
\(=9.3.1001+9.30.\left(1,1.1000\right)+9.30.899,9\)
\(=9.3.1001+9.3.10.1100+9.3.10.899,9\)
\(=9.3.1001+9.3.11000+9.3.8999\)
\(=9.3\left(1001+11000+8999\right)\)
\(=27.21000=567000\)
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Tính nhanh:
A=24.47-23/24+47-23 . (3+3/7-3/11+3/1001-3/13)/(9/1001-9/13+9/7-9/11+9)
3 tháng 3 2023 lúc 18:59
tính nhanh:
\(\dfrac{24.47-23}{24+47.23}.\dfrac{3+\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{1001}-\dfrac{3}{13}}{\dfrac{9}{1001}-\dfrac{9}{13}+\dfrac{9}{7}-\dfrac{9}{11}+9}\)
\(\dfrac{24\cdot47-23}{24+47\cdot23}\cdot\dfrac{3+\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{1001}-\dfrac{3}{13}}{\dfrac{9}{1001}-\dfrac{9}{13}+\dfrac{9}{7}-\dfrac{9}{11}+9}\\ =\dfrac{24\cdot\left(24+23\right)-23}{24+\left(24+23\right)\cdot23}\cdot\dfrac{3\left(1+\dfrac{1}{7}-\dfrac{1}{11}+\dfrac{1}{1001}-\dfrac{1}{13}\right)}{9\left(1+\dfrac{1}{7}-\dfrac{1}{11}+\dfrac{1}{1001}-\dfrac{1}{13}\right)}\\ =\dfrac{24\cdot24+24\cdot23-23\cdot1}{24+24\cdot23+23\cdot23}\cdot\dfrac{1}{3}\\ =\dfrac{23\left(24-1\right)+24\cdot24}{24\left(1+23\right)+23\cdot23}\cdot\dfrac{1}{3}=\dfrac{23\cdot23+24\cdot24}{24\cdot24+23\cdot23}\cdot\dfrac{1}{3}\\ =1\cdot\dfrac{1}{3}=\dfrac{1}{3}\)
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Tính nhanh
(67,895 * 0,5 + 3, 1416 * 0,5 ) * (9 *0,9 +0,9 -0,9 *10)
( 67,875 * 0,5 + 3,1416 * 0,5 ) * ( 9 * 0,9 + 0,9 - 0,9 * 10)
= ( 67,875 * 0,5 + 3,1416 * 0,5 ) * 0,9 * ( 9 + 1 - 10 )
= ( 67,875 * 0,5 + 3,1416 * 0,5 ) * 0,9 * 0
=0
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Tính nhanh :
A= \(\frac{24\cdot43-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
Giải hộ đúng mk tick
\(\frac{11}{12}.\frac{3.\left(1+\frac{1}{7}-\frac{1}{11}+\frac{1}{1001}-\frac{1}{13}\right)}{9.\left(\frac{1}{1001}-\frac{1}{13}+\frac{1}{7}-\frac{1}{11}+1\right)}=\frac{11}{12}.\frac{1}{3}=\frac{11}{36}\)
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Tính nhanh:
a.A=24*47-23/24+47-23/*3+3/7-3/11+3/1001-3/13/9/1001-9/13+9/7-9/11+9
b.B=(-329)+(-15)+(-101)+440+2019
c.M=1+2+2^2+2^3+...+2^2012/2^2014-2
Tính nhanh:
a)\(\frac{24\cdot47-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
b)\(\frac{1+2+2^2+...+2^{2012}}{2^{2014}-2}\)
\(\frac{24\cdot47-23}{24+47\cdot23}.\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
\(=\frac{24\cdot\left(24+23\right)-23}{24+\left(24+23\right)\cdot23}\cdot\frac{3\left(1+\frac{1}{7}-\frac{1}{11}+\frac{1}{1001}-\frac{1}{13}\right)}{9\left(\frac{1}{1001}-\frac{1}{13}+\frac{1}{7}-\frac{1}{11}+1\right)}\)
\(=\frac{24^2+24\cdot23-23}{24+24\cdot23+23^2}\cdot\frac{3}{9}\) \(=\frac{24^2+23\cdot\left(24-1\right)}{\left(23+1\right)\cdot24\cdot23^2}\cdot\frac{1}{3}=1\cdot\frac{1}{3}=\frac{1}{3}\)
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Tính nhanh :
\(A=\dfrac{24.47-23}{24+47-23}.\dfrac{3+\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{1001}-\dfrac{3}{13}}{\dfrac{9}{1001}-\dfrac{9}{13}+\dfrac{9}{7}-\dfrac{9}{11}+9}\)
A=(24.47-23)/(24+47-23) . [3(1+1/7-1/11-1/13+1/1001)]/[9(1+1/7-1/11-1/13+1/1001)]
=1105/48 . 3/9 =1105/144
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Tính nhanh:
( 67,895 * 0,5 + 3,1416 * 0,5 ) * ( 9 * 0,9 + 0,9 - 0,9 * 10 )
Giúp mk với, ai nhanh tick ạ!!!!!!!
= [(67,895 + 3,1416) *0,5)] * [(9+1-10) *0,9]
= [71,0366 * 0,5] * [0 * 0,9]
= 35,5183 * 0
= 0
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( 67,895 * 0,5 + 3,1416 * 0,5 ) * ( 9 * 0,9 + 0,9 - 0,9 * 10 ) =
=0,5 *(67,895+ 3,1416)*0,9*(9+1-10)
=0,5 *(67,895+ 3,1416)*0,9*0
=0
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Tính nhanh: (67,895*0,5 + 3,1416*0,5)*( 9*0,9 + 0,9 - 0,9*10)
(67,895*0,5 + 3,1416*0,5)*( 9*0,9 + 0,9 - 0,9*10)
= (67,895*0,5 + 3,1416*0,5)*(8,1 + 0,9 - 9)
= (67,895*0,5 + 3,1416*0,5)*0
= 0