17*13+17*42-17*35
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a) \(36.\left(-57\right)-57.64\)
\(=36.\left(-57\right)+\left(-57\right).64=\left(-57\right).\left(36+64\right)\)
\(=\left(-57\right).100=-5700\)
b)\(32.\left(-17\right)+\left(-18\right).17-50.13\)
\(=\left(-32\right).17+\left(-18\right).17-50.13\)
\(=17.\left(-32-18\right)-50.13=17.\left(-50\right)+\left(-50\right).13\)
\(=\left(-50\right).\left(17+13\right)=\left(-50\right).30=-150\)
c)\(-\left(-35\right)+12-|-35|-42\)
\(=35+12-35-42=12-42=-30\)
d)\(\left(-15-12\right):\left(-3\right)^2+5-13.\left(-2\right)+\left(-64\right):2^3\)
\(=-27:9+5+26-64:8=-3+5+26-8=20\)
e)\(\left(135-35\right).\left(-37\right)+37.\left(-42-58\right)=100.\left(-37\right)+37.\left(-100\right)\)
\(=\left(-100\right).37+37.\left(-100\right)=\left(-100\right).\left(37+37\right)\)
\(=\left(-100\right).74=-7400\)
Chúc em học tốt!!!!!!
\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)
\(=\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)
\(=\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\left(\frac{-18}{35}+\frac{-17}{35}\right)\)
\(=\frac{17}{17}+\frac{-13}{13}+\frac{-35}{35}\)
\(=1+\left(-1\right)+\left(-1\right)\)
\(=-1\)
\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)
= \(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)
= \(\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\frac{-18}{35}\)
= 1+(-1)+\(\frac{-18}{35}\)
= 0+\(\frac{-18}{35}\)
= \(\frac{-18}{35}\)
3/17 - 5/13 - 18/35 + 14/17 + 17/-35 - 8/13
=(3/17+14/17)+(-5/13-8/13)+(-18/35+17/35)
=1+(-1)+(-1/35)
=-1/35
Chúc bn học tốt
\(\frac{3}{17}-\frac{5}{13}-\frac{18}{35}+\frac{14}{17}\)\(+\frac{17}{-35}-\frac{8}{13}\)
\(=\left(\frac{3}{17}+\frac{14}{17}\right)\)\(-\left(\frac{18}{35}-\frac{-17}{35}\right)\)\(-\left(\frac{5}{13}+\frac{8}{13}\right)\)
\(=1-1-1\)\(=0\)
(42-69+17)-(42+17)
=42-69+17+(-42)-17
=[42+(-42)]+[17+(-17)]-69
=0+0-69
=0-69
=-69
Bài làm
a) ( 42 - 69 + 17 ) - ( 42 - 17 )
= 42 - 69 + 17 - 42 + 17
= 42 - 69 - 42 + 34
= 34 - 69
= -35
b) 85 x ( 35 - 27 ) - 35 x ( 85 - 27 )
= 85 x 35 - 85 x 27 - 35 x 85 + 35 x 27
= ( 85 x 35 - 35 x 85 ) - ( 85 x 27 + 35 x 27 )
= 0 - [ 27 x ( 85 + 35 ) ]
= 0 - [ 27 x 120 ]
= 0 - 3240
= -3240
# Học tốt #
\(703-140:\left(42+28\right)-17^{15}:17^{13}\)
\(=730-140:70-17^2\)
\(=730-2-289\)
\(=439\)
39.(19-13)-19.(39-13)
=39.19 - 39.13 - 19.39 - 19.13
=0
(42-69+17)-(42+17)
=42-69+17-42-17
=0-69+0
=-69
137.(-26)+26.137
=137[(-26)+26]
=137.0
=0
-67.11
=-67(10+1)
=-670+-67
=-737
65.(-21)
=65[-(10+10+1)]
=-650+-650+-65
=-1365
a) \(42-13< 30\)
\(70-25=45\)
b) \(52-15< 60-15\)
\(54-17>45-17\)
a, (-17) + 21 + 79 + 17
= (-17 + 17) + (21 + 79)
= 0 + 100
= 100
b, 40 + 22 + (-16) + (-44)
= 40 + {(-16) + (-44} + 22
= 40 - 60 + 22
= - 20 + 22
= 2
c, (-12) + (-47) + (-28) + 47
= - (12 + 28) + (-47 + 47)
= - 40 + 0
= - 40
d, (- 5) + (-3) + 35 + (-17)
= (-5 + 35) - (3 + 17)
= 30 - 20
= 10
340 là kết quả đúng
Trả lời
17.13+17.42+17.35
=17.(13+42-35)
=17.(55-35)
=17.20
=340.
Học tốt ! Pu cha ! ^.^