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14,58 . 460 + 7,29 . 540 . 2
= 14,58 . 460 + 14,58 . 540
= 14,58 . ( 460 + 540 )
= 14,58 . 1000
= 14580
A = 14,58 . 460 + (7,29. 2 ) . 540
= 14,58 . 460 + 14,58 . 540
= 14,58 . (460+540)
= 14,58 . 1000 = 14580
Tk mk nha
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\(a,-101-500-399\\ =-100-500-400\\ =-1000\\ b,-540+2020-460+100\\ =-500-\left(40+460\right)+2020+1000\\ =-500-500+1000+2020\\ =2020\)
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a) ( 725 + 275 ) : 2 = 1000:2
= 500
b) 1458 x ( 460 + 540 ) = 1458 x 1000
= 1458000
d) (120 + 112 ) + ( 116 + 84 ) = 232 + 200
= 432
725:2+275:2=275
1458x460+1458x540=1458000
52+54+55+56+...+88=2536
120+116+112+84=432
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a, \(\frac{2}{5}.\frac{1}{3}-\frac{2}{15}:\frac{1}{5}+\frac{3}{5}.\frac{1}{3}\)
\(=\frac{1}{3}.\left(\frac{2}{5}+\frac{3}{5}\right)-\frac{2}{15}.5\)
\(=\frac{1}{3}.1-\frac{2}{3}\)
\(=\frac{1}{3}-\frac{2}{3}\)
\(=\frac{-1}{3}\)
b, \(\left(6-2\frac{4}{5}\right).3\frac{1}{8}+1\frac{3}{8}:\frac{1}{4}\)
\(=\left(6-\frac{14}{5}\right).\frac{25}{8}+\frac{11}{8}.4\)
\(=\frac{16}{5}.\frac{25}{8}+\frac{11}{2}\)
\(=10+\frac{11}{2}\)
\(=\frac{31}{2}\)
1/3×(3/5+2/5)-2/15×1/5
1/3×1-2/15×1/5
1/3-2/15×1/5
1/3-2/75
25/75-2/75
23/75
(6-14/5)×25/8-11/8:4/1
16/5×25/8-11/8:4/1
10/1-11/8:4/1
10/1-11/8×1/4
10/1-11/32
320/32-11/32
309/32
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a, (20.2^4+12.2^4-48.2^2):8^2
=(20.2^4+12.2^4-12.2^2.2^2):8^2
=(20.2^4+12.2^4-12.2^4):2^6
=2^4.(20+12-12):2^6
=2^4.20:2^6
=2^4.2^2.5:2^6
=5
b,
=5^4.(75+175):15625
=5^4.250:15625
=156250:15625
=10
c, Thì chắc bạn chép sai đề bài rồi,đề bài của mình thế này cơ:
16 x 64 x 82 : ( 43 x 25 x 16 )
=2^4.2^6.2^6:(2^6.2^5.2^4)
=2^18:2^5
=2^13
K MÌNH NHA
Biến đổi tử số và mẫu số,ta có :
Tử số : 20,2 x 51 - 30,3 x 3,4 + 14,58
= 103,02 - 103,02 + 14.58
= 0 + 14,58 = 14,58
Mẫu số : 14,58 x 460 + 7,29 x 540 x 2
= 14,58 x 460 + 14,58 x 540
= 14,58 x \((460+540)\)
= 14.58 x 1000
= 14580
Thay vào ta có : = 14,58 : 14580
= 0,001
Vậy : \(\frac{20,2\cdot5,1-30,3\cdot3,4+14,58}{14,58\cdot460+7,29\cdot540\cdot2}=0,001\)
~Chúc bn học giỏi~