\(a/ (- 25).(- 125).(- 4). (- 8)=[(-25).(-4)].[(-125).(-8)] =100.1000=100000\)
a/(−25).(−125).(−4).(−8)
= [(−25).(−4)].[(−125).(−8)]
= 100.1000
=100000
b/ (-50) . (-80) . (-2) . (-9)
= [(-50) . (-20)] . [ (-80) . (-9) ]
= 100 . 720
= 72000
\(a/ (- 25).(- 125).(- 4). (- 8)=[(-25).(-4)].[(-125).(-8)] =100.1000=100000\)
a/(−25).(−125).(−4).(−8)
= [(−25).(−4)].[(−125).(−8)]
= 100.1000
=100000
b/ (-50) . (-80) . (-2) . (-9)
= [(-50) . (-20)] . [ (-80) . (-9) ]
= 100 . 720
= 72000
a, \(\left|x\right|\) + 3 = 5
b, \(\left|x+3\right|\) = 5
c, \(\left|x-7\right|\) + 13 = 25
d, 26 - \(\left|x+9\right|\) = -13
e, 8 - \(\left|x\right|\) = 15
f, 6 - \(\left|-3+x\right|\) = -15
Tìm x, biết:
Điền dấu ">", "<" thích hợp vào chỗ trống :
a) \(\left(-2\right)+\left(-5\right)......\left(-5\right)\)
b) \(\left(-10\right)......\left(-3\right)+\left(-8\right)\)
tính nhanh (-50)+(230) +(-45)+230
Tìm x \(\in\)Z , biết:
a)(2x-5)+17=6
b)10-2(4-3x)=-4
c)-12+3(-x+7)=-18
d)24(3x-2)=-3
e)-45:5(3x-2x)=3
g)x(x+7)=0
h)(x+12)(x-3)=0
i)(-x+5)(3-x)=0
k)x(2+x)(7-x)=0
l)(x-1)(x+2)(-x-3)=0
Câu 4. Tìm số nguyên x, biết
a) 8.x = 64
b) (-5).x = 25
c) 4.x+1+ 21
d) (-3).x -1= 8
Tính :
a) \(8274+226\)
b) \(\left(-5\right)+\left(-11\right)\)
c) \(\left(-43\right)+\left(-9\right)\)
Tính :
a) \(2763+152\)
b) \(\left(-7\right)+\left(-14\right)\)
c) \(\left(-35\right)+\left(-9\right)\)
Câu 3. Tính
a) ( - 11) x ( - 28) + (- 9) x 13
b) ( - 69 ) x ( - 31) - ( - 15) x 12
c) [16 - (- 5) ] x (-7)
d)[(- 4) x (- 9) - 6]x[(-12) - (-7)]