Rút gọn phân số :a, \(\frac{3.13-13.8}{15.40-80}\)
B,\(\frac{18.34+\left(-18\right).124}{\left(-36\right).17+9_{ }\left(-52\right)}\)
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Rút gọn:
\(a,\) \(\frac{3.13-13.18}{15.40-80}\)
\(b,\frac{3^{10}.(-5)^{21}}{(-5)^{20}.3^{12}}\)
\(c,\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
rút gọn:
\(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
giải chi tiết nha
\(\dfrac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\) =\(\dfrac{18.34-18.124}{9.\left(-4\right).17+9.\left(-52\right)}=\dfrac{18.\left(34-124\right)}{9.\left(-68\right)+9.\left(-52\right)}\) =\(\dfrac{18.\left(-90\right)}{9.\left(-68-52\right)}=\dfrac{18.\left(-90\right)}{9.\left(-120\right)}=\dfrac{3}{2}\)
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\(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}=\frac{18.34-18.124}{9.\left(-4\right)+17+9.\left(-52\right)}=\frac{18.\left(34-124\right)}{9.\left(17-52\right).\left(-4\right)}\)
\(\frac{18.\left(-90\right)}{9.\left(-35\right).\left(-4\right)}=\frac{18.\left(-90\right)}{9.140}=\frac{9.2.\left(-9\right).10}{9.7.2.10}=\frac{-9}{7}\)
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a)frac{-135}{540}b)frac{25.13}{26.35}c)frac{6.9-2.17}{63.3-119}d)frac{3.13-13.18}{15.40-80}e)frac{-5^3.40.4^4}{135.left(-2right)^{14}.left(-100right)^0}f)frac{2929-101}{2.1919+404}g)frac{-1997.1996+1}{left(-1995right).left(-1997right)+1996}h)frac{2.3+4.6+14.21}{3.5+6.10+21.35}i)frac{3.7.13.37.39-10101}{505050-70707}k)frac{18.34+left(-18right).124}{-36.17+9.left(-52right)}
Đọc tiếp
a)\(\frac{-135}{540}\)
b)\(\frac{25.13}{26.35}\)
c)\(\frac{6.9-2.17}{63.3-119}\)
d)\(\frac{3.13-13.18}{15.40-80}\)
e)\(\frac{-5^3.40.4^4}{135.\left(-2\right)^{14}.\left(-100\right)^0}\)
f)\(\frac{2929-101}{2.1919+404}\)
g)\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
h)\(\frac{2.3+4.6+14.21}{3.5+6.10+21.35}\)
i)\(\frac{3.7.13.37.39-10101}{505050-70707}\)
k)\(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
Rút gọn phân số :
a)\(\frac{6.9-2.17}{6.3-11.9}\)
b)\(\frac{3.13-13.18}{15.40-80}\)
c)\(\frac{\left(-5\right)^3.40.43}{135.\left(-2\right)^{14}.\left(-100\right)^0}\)
d)\(\frac{2929-101}{2.1919+404}\)
Can you help me ?
rút gọn các biểu thức sau:
\(c=\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
nhớ làm đầy đủ, mik tk
\(C=\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}=\frac{18.\left(34-124\right)}{9.\left(-4.17-52\right)}=\frac{18.\left(-90\right)}{9.\left(-120\right)}=\frac{3}{2}\)
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\(c=\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
\(=\frac{18.34+18.\left(-124\right)}{9.-3.17+9.\left(-52\right)}\)
\(=\frac{18.\left(34+\left(-124\right)\right)}{9.\left(-3+17\right).\left(52\right)}\)
tk ủng hộ mk nha!!!!!!!!!!
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\(c=\frac{18.34=\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
= \(\frac{18.34+18.\left(-124\right)}{36.\left(-17\right)+9.\left(-52\right)}=\frac{18.\left(-124+34\right)}{9.4.\left(-17\right)+9.\left(-52\right)}\)\(=\frac{18.\left(-90\right)}{9.\left(-68\right)+9.\left(-52\right)}=\frac{18.\left(-90\right)}{9.\left[-68+\left(-52\right)\right]}\)
\(=\frac{18.\left(-90\right)}{9.\left(-120\right)}\)\(=\frac{2.\left(-9\right)}{1.\left(-12\right)}=-\frac{18}{12}=\frac{-3}{2}\)
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rút gọn:
a) \(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)b) \(\frac{3.7.13.37.39-10101}{505050-70707}\)c) \(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
Rút gọn phân số
\(\frac{2.3+4.6+14.21}{3.5+6.10+21.35}\) ; \(\frac{3.7.13.37.39-10101}{505050-70707}\) ; \(\frac{18.34+\left(-18\right).124}{-36.17+9.\left(-52\right)}\)
30 tháng 4 2021 lúc 20:17
rút gọn phân số:
\(a.\dfrac{-315}{540}\)
\(b.\dfrac{25.13}{26.35}\)
\(c.\dfrac{3.13-13.18}{15.40-80}\)
\(d.\dfrac{-1997.1996+1}{\text{(}-1995\text{)}.\left(-1997\right)+1996}\)
Xem thêm câu trả lời
Rút gọn các phân số sau
a,\(\frac{6.9-2.17}{63.3-119}\)b,\(\frac{3.13-13.18}{15.40-80}\) c,\(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}\)
d,\(\frac{3.7.13.37.39-10101}{505050-70707}\)
e,\(\frac{2929-101}{2.1919+404}\)
Trả lời:
a, \(\frac{6\times9-2\times17}{63\times3-119}=\frac{2.3\times9-2\times17}{7.9\times3-7.17}\)
\(=\frac{2\times\left(3\times9-17\right)}{7\times\left(3\times9-17\right)}\)
\(=\frac{2}{7}\)
b, \(\frac{3\times13-13\times18}{15\times40-80}=\frac{13\times\left(3-18\right)}{40\times\left(15-2\right)}\)
\(=\frac{13\times-15}{40\times13}\)
\(=\frac{-3}{8}\)
c, \(\frac{-1997.1996+1}{\left(-1995\right).\left(-1997\right)+1996}=\frac{-1997.1996+1}{\left(1-1996\right).\left(-1997\right)+1996}\)
\(=\frac{-1997.1996+1}{-1997-1996.\left(-1997\right)+1996}\)
\(=\frac{-1997.1996+1}{-1996.\left(-1997\right)-1}\)
\(=\frac{-1997.1996+1}{-\left[1996.\left(-1997\right)+1\right]}\)
\(=-1\)
d, \(\frac{3.7.13.37.39-10101}{505050-70707}=\frac{10101.39-10101}{50.10101-7.10101}\)
\(=\frac{10101.\left(39-1\right)}{10101.\left(50-7\right)}\)
\(=\frac{10101.38}{10101.43}\)
\(=\frac{38}{43}\)