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a) \(35\left(14-101\right)-14\left(35-10\right)\)
\(=35\cdot14-35\cdot101-14\cdot35+14\cdot10\)
\(=140-3535=-3395\)
b) \(5^2\cdot\left(-3\right)^3=25\cdot\left(-27\right)=-675\)
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\(\left(128-49\right)+\left(-51-28\right)\)
\(=128-49-51-28\)
\(=\left(128-28\right)-\left(49+51\right)\)
\(=100-100=0\)
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a)=9*3-26
=27-26
=1
b)=125*100-25*100
=12500-2500
=10000
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− 5 7 + 14 11 − 11 14 − 14 − 11 = − 5 7 − 11 14 = − 21 14 = − 3 2 .
Thực hiện các phép tính(tính nhanh nếu có thể)
a)135-12.(3+6)
b)36+4.(7-15)
c) (-3)2 .23
d)(-6-14):(-5)
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a, 135 - 12 . 9
= 135 - 108
= 27
b, 36 + 4 . -8
= 36 + (-32)
= 36 - 32
= 4
c, (-3)2 . 23
= 9 . 8
= 72
d, ( -6 - 14 ) : (-5) = (-21) : (-5) = 4,2
a 135-12*(3+6)
= 135 - 12*9
= 135 - 12*(10-1)
=135- (12*10-12*1
)=135-(120-12)
=135-108
=27
b= 35+4*-8
=35+ 4*(-10+2)
=35+(4*-10+4*2)
=35+(-40+8)
=35+-32
=3
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= \(\frac{2}{7}.\left(5\frac{1}{4}-3\frac{1}{4}\right)\)
= \(\frac{2}{7}.2\)
= \(\frac{4}{7}\)
\(\frac{2}{7}.5\frac{1}{4}-\frac{2}{7}.3\frac{1}{4}\)
=> \(\frac{2}{7}.\left(5\frac{1}{4}-3\frac{1}{4}\right)\)
=> \(\frac{2}{7}.2\)
=> \(\frac{4}{7}\)
#Hk_tốt
#Ngọc's_Ken'z
-28:14/3
=-28.3/14
=-6
\(\left(-28\right):\dfrac{14}{3}=\left(-28\right)\cdot\dfrac{3}{14}=\dfrac{-7\cdot2\cdot2\cdot3}{7\cdot2}=-6\)