a) 10+10(100-102) b)(-7).18+(-3).(-10)-15 c)(-4)2.5+2.(20-15) d) (-235-35):2 e) (-92):(-4)+(-7).(-3)
g) 20-540:(25-28)3 h)(315-427).(-4)+31.(-7-13) k) 330:(7-17)-17.(-3-17) l) (-2).(-6)2-54:(1-4)2
Những câu hỏi liên quan
a) 10+10(100-102) b) (-7).18+(-3).(-10)-15 c) (-4)2.5+2.(20-25) d) (-235-35):2 e) (-92):(-4)+(-7).(-3)
g) 20-540:(25-28)3 h) (315-427).(-4)+(46-89).(-3) i) (6-26).(-4)+31.(-7-13) k) 330:(7-17)-17.(-3-17)
l) (-2).(-6)2-54:(1-4)2
a) 10+10(100-102) b) (-7).18+(-3).(-10)-15 c) (-4)2.5+2.(20-25) d) (-235-35):2 e) (-92):(-4)+(-7).(-3)
g) 20-540:(25-28)3 h) (315-427).(-4)+(46-89).(-3) i) (6-26).(-4)+31.(-7-13) k) 330:(7-17)-17.(-3-17)
l) (-2).(-6)2-54:(1-4)2
a ) - 8 / 24 + - 4 / 12
b ) - 20 / 35 + 16 / 24
c ) - 3 / 9 + - 6 / 15
d ) 3 / 13 - 4 / 10
e ) 5 / 17 - 9 / 15
g ) 9 / 18 - 6 / 15 + 3 / - 9
h ) 5 / 4 - 1 / 2 + - 7 / 8
câu a :
\(\dfrac{-8}{24}+\dfrac{-4}{12}=\dfrac{-1}{3}+\dfrac{-1}{3}=\dfrac{-2}{3}\)
câu b :
\(\dfrac{-20}{35}+\dfrac{16}{24}=\dfrac{-4}{7}+\dfrac{2}{3}=\dfrac{2}{21}\)
câu c :
\(\dfrac{-3}{9}+\dfrac{-6}{15}=\dfrac{-1}{3}+\dfrac{-2}{5}=\dfrac{-11}{15}\)
câu d :
\(\dfrac{3}{13}-\dfrac{4}{10}=\dfrac{3}{13}-\dfrac{2}{5}=\dfrac{-11}{65}\)
câu e :
\(\dfrac{5}{17}-\dfrac{9}{15}=\dfrac{5}{17}-\dfrac{3}{5}=\dfrac{-26}{85}\)
câu g :
\(\dfrac{9}{18}-\dfrac{6}{15}+\dfrac{3}{-9}=\dfrac{9}{18}-\dfrac{6}{15}+\dfrac{-3}{9}\\ =\dfrac{1}{2}-\dfrac{2}{5}+\dfrac{-1}{3}=\dfrac{-7}{30}\)
câu h :
\(\dfrac{5}{4}-\dfrac{1}{2}+\dfrac{-7}{8}=\dfrac{10}{8}-\dfrac{4}{8}+\dfrac{-7}{8}=\dfrac{-1}{8}\)
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a.9/27+7/-49 b.-12/10+-25/30 c.-20/35+-16/-24 d.-21/77+10/-35 e.36/-84+100/450 g.2/7+1/3+-2/-5 h.1/5+-14/-20+6/21 k.23.5-23 /4-27+2130-15/3550-25+2.13/23 .Rút gọn trước và sau khi xong
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1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+149+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39*100
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a) -5/9 . 4/13+ -5/9. 9/13+2 và 5/9 ( 2 và 5/9 là hỗn số)
b) (-2)^3. -1/24+( 4/3- 1 và 5/6) : 3/14
c) 200 - (-100) -100+ (-20)
d) 15/34 +7/21 +19/34 -5/15 +3/7
e) (1-1/2) . (1-1/3). (1-1/4).....(1-1/1012)
g) (1/2+1/3-1/4) : 7/24
h) 15^20 . 9^10/ 27^12.25^10
Rút gọn P/S:
a) -315/540
b) 25*13 / 26*35
c) 6*9-2*17 / 63*3-119
d) 3*13-13*18 / 15*40-80
e) (-5)^3 * 40 * 4^3 / 135 * (-2)^14 * (-100)^0
f) 2929-101/2*1919+404
g) -1997*1996+1/(-1995)*(-1997)+1996
h) 2*3+4*6+14*21/3*5+6*10+21*35
i) 3*7*13*37*39-10101/505050-70707
a) \(\frac{-315}{540}=\frac{-7}{12}\)
b) \(\frac{25.13}{26.35}=\frac{5.1}{2.7}=\frac{5}{14}\)
c) \(\frac{6.9-2.17}{63.3-119}=\frac{2.1-2.17}{7.1-119}=\frac{2.\left(1-17\right)}{7.1-119}=\frac{2.\left(-16\right)}{7-119}=\frac{-32}{-112}=\frac{32}{112}=\frac{2}{7}\)
Làm đến đây là choáng r
Các câu típ theo bn làm nhé
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d) 3.13-13.18/15.40-80 = 13.(3-18)/520= 13.(-15)/ 520 = -125/520=-3/8
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Bài 1 : Tính :
a)-|-5+3-7|-|-5+7
b)24-(72-13+24)-(72-13)
c)|4-9-5|-(4-9-5)-15+9
d)-20-(25-11+8)+(25-8+20)
e)|-5+7-8|-(-5+7-8)
f) (-20+10-3)-(-20+10)+27
g)13-[5-(4-5)+6]-[3-(2-7)]
h) (14-12-7)-[-(-3+2)+(5-9)]
i)14-23+(5-14)-(5-23)+17
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37=
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37
=(1+37)x37:2
=703
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