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\(A=\left(8+2\cdot3-7\cdot\dfrac{13}{10}+3\cdot\dfrac{5}{4}\right):\left(\dfrac{5\sqrt{6}}{3}\right)^2\\ A=\left(14-\dfrac{91}{10}+\dfrac{15}{4}\right):\dfrac{50}{3}\\ A=\dfrac{173}{20}\cdot\dfrac{3}{50}=\dfrac{519}{1000}\)
a; A = |-101| + |21| + |-99| - |25|
A = 101 + 21 + 99 - 25
A = (101 + 99) - (25 - 21)
A = 200 - 4
A = 196
b; B = ||17 - 42| - 64|
B = ||-25| - 64|
B = |25 - 64|
B = |-39|
B = 39
c, C = |27 - 72| + |33 - 34| + |103 - 35|
C = |128 - 49| + |27 - 81| + |1000 - 243|
C = |79| + |-54| + | 757|
C = 79 + 54 + 757
C = 133 + 757
C = 890
\(D=\log_{5^{-1}}\left(5^2\right)-3\log_{3^2}\left(3^{-1}\right)+4.\log_{2^{\frac{3}{2}}}2^6=-2+\frac{3}{2}+16=\frac{31}{2}\)
2 giờ 25 phút x 3 – 3,8 giờ *
= 7 giờ 15 phút - 3,8 giờ
=3,45 giờ
a) \(A=27\cdot36+73\cdot99+27\cdot14-49\cdot73\)
\(A=27\cdot\left(36+14\right)+73\cdot\left(99-49\right)\)
\(A=27\cdot50+73\cdot50\)
\(A=50\cdot\left(27+73\right)\)
\(A=50\cdot100\)
\(A=5000\)
b) \(B=\left(4^5\cdot10\cdot5^6+25^5\cdot2^8\right):\left(2^8\cdot5^4+5^7\cdot2^5\right)\)
\(B=\dfrac{\left(2^2\right)^5\cdot2\cdot5\cdot5^6+\left(5^2\right)^5\cdot2^8}{2^8\cdot5^4+5^7\cdot2^5}\)
\(B=\dfrac{2^{11}\cdot5^7+5^{10}\cdot2^8}{2^8\cdot5^4+5^7\cdot2^5}\)
\(B-\dfrac{2^8\cdot5^7\cdot\left(2^3\cdot1+5^3\cdot1\right)}{2^5\cdot5^4\cdot\left(2^3\cdot1+5^3\cdot1\right)}\)
\(B=\dfrac{2^8\cdot5^7}{2^5\cdot5^4}\)
\(B=2^3\cdot5^3\)
\(B=10^3\)
\(B=1000\)
= 30 . 497 + 632
= 30 . 1129
= 33870