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b) (-17) . 37 - 23 . 37 - (-46) . 37
= 37 . {(-17) - 23 - (-46)}
= 37 . 6 = 222
a) 29.(-13) +27.(-29)+(-14).-(29)
=(-29).13+ 27.(-29)+(-14).(-29)
=(-29).[13+27+(-14)]
=(-29).26
=-754
a) = 29.[(-13)+27]+(-14).(-19)
=29.(-14)+(-14).(-19)
=(-14).[29+(-19)]
=(-14).10
=-140
29+29+......+29+83+...+83
=29.17+83.29
=29(17+83)
=29.100
=2900
tick bạn
A) =(5+(-15))+(9+(-19))+(-11)+(13+17)+(21+(-23))
=(-10)+(-10)+(-11)+20+(-2)
=((-10)+(-10))+(-11)+(-2)+20
=(-20)+(-11)+20+(-2)
=((-20)+20)+((-11)+(-2))
=0+(-13)=-13
B) doi ti !!!!! Tich cho mik nha
a ) 31 x ( - 125 ) + 225 x 31
= 31 x [ ( - 125 ) + 225 ]
= 31 x 100
= 3100
b ) 26 x ( - 125 ) - 125 x ( - 36 )
= ( - 26 ) x 125 - 125 x ( - 36 )
= 125 x [ ( - 26 ) - ( - 36 ) ]
= 125 x 10
= 1250
a) 31 × (-125) + 225 × 31
= 31 x ( -125 + 225 )
= 31 x 100
= 3100
b) 26 × (-125) – 125 × (-36)
= -125 ( 26 - 36 )
= 125x 10
= 1250
d) 17 × (-37) – 23 × 37 – 46 × (-37)
= -629 - 851 + 1702
= 1480
a) \(\frac{17}{23}.\frac{18}{16}.\frac{23}{17}-\left(-80\right)-\frac{3}{4}\)
= \(\frac{17.18.23}{23.16.17}+80-\frac{3}{4}\)
= \(\frac{9}{8}+80-\frac{3}{4}\)
= \(\frac{3}{8}+80=\frac{643}{8}\)
b) \(\frac{5}{11}.\frac{18}{29}-\frac{5}{11}.\frac{8}{29}+\frac{5}{11}.\frac{19}{29}\)
= \(\frac{5}{11}.\left(\frac{18}{29}-\frac{8}{29}+\frac{19}{29}\right)\)
= \(\frac{5}{11}.1=\frac{5}{11}\)
c) \(\left(\frac{13}{23}+\frac{1313}{2323}-\frac{131313}{232323}\right).\left(\frac{1}{3}+\frac{1}{4}-\frac{7}{12}\right)\)
= \(\left(\frac{13}{23}+\frac{1313}{2323}-\frac{131313}{232323}\right).0\)
= \(0\)
a) 27 x 35 + 73 x 6 - 27 x 29
= 27 x ( 35 - 29 ) + 73 x 6
= 27 x 6 + 73 x 6
= 6 x ( 27 + 73 )
= 6 x 100
= 600
b) 29 x ( 47 + 53 ) - 47 x ( 29 + 53 )
= 29 x 47 + 29 x 53 - 47 x 29 + 47 x 53
= 29 x ( 47 + 53 - 47 ) + 47 x 53
= 29 x 53 + 47 x 53
= 53 x ( 29 + 47 )
= 53 x 76
= 4028
c) 5 x 17 x 4 x 25 x 20
= ( 5 x 20 ) x ( 4 x 25 ) x 17
= 100 x 100 x 17
= 10000 x 17
= 170000
a,(17-414)-(586-83)
=17-414-586+83
=(17+83)+(-414-586)
=100+(-1000)
=-900
b,29.(-13)+27.(-29)+(-140).(-29)
=(-29).(-1).(-13)+27.(-29)+(-140).(-29)
=(-29).13+27.(-29)+(-140).(-29)
=(-29).(13+27-140)
=(-29).(-100)
=2900