Tinh hop li neu co the
a:15,2-4,18-2,09 B; 60-26,75-13,35 C: 38,25-18,25+21,64-11,64
D:45,28+52,17-15,28-12,1
Những câu hỏi liên quan
(tinh) hop li neu co the6,3+(3,7)+2,4+0,3
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Tinh hop li ( neu co the):-23.63+23.21-58.23
\(-23.63+23.21-58.23\)
\(=-23.\left(63+21-58\right)\)
\(=-23.26\)
\(=-598\)
k mik nha
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nhung lai co 2 so 23 va 1 so -23 nen lam the la sai
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Sao cau lai ghi la ko mik nha la j vay
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1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
\(\dfrac{1}{4}-\dfrac{1}{3}+\dfrac{5}{12}\\ =\dfrac{3}{12}-\dfrac{4}{12}+\dfrac{5}{12}\\ =\dfrac{3-4+5}{12}\\ =\dfrac{4}{12}\\ =\dfrac{1}{3}\)
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tinh gia tri bieu thuc theo cach hop li neu co the )
thuc hien phep tinh bang cach hop li neu co the 37x96-86x37+2x23x5-30+4x16x25
Tinh hop li (neu co the)
(1-1/3).(1-1/6).(1-1/10)......(1-1/190)
\(\left(1-\frac{1}{3}\right).\left(1-\frac{1}{6}\right).\left(1-\frac{1}{10}\right)...\left(1-\frac{1}{190}\right)\)
\(=\frac{2}{3}.\frac{5}{6}.\frac{9}{10}...\frac{189}{190}\)
\(=\frac{4}{6}.\frac{10}{12}.\frac{18}{20}...\frac{378}{380}\)
\(=\frac{1.4}{2.3}.\frac{2.5}{3.4}.\frac{3.6}{4.5}...\frac{18.21}{19.20}\)
\(=\frac{1.2.3...18}{2.3.4...19}.\frac{4.5.6...21}{3.4.5...20}\)
\(=\frac{1}{19}.\frac{21}{3}\)
\(=\frac{1}{19}.7=\frac{7}{19}\)
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\(\left(1-\frac{1}{3}\right).\left(1-\frac{1}{6}\right).\left(1-\frac{1}{10}\right)...\left(1-\frac{1}{190}\right)\)
\(=\frac{2}{3}.\frac{5}{6}.\frac{9}{10}....\frac{189}{190}\)
\(=\frac{4}{6}.\frac{10}{12}.\frac{18}{20}....\frac{378}{380}\)
\(=\frac{1.4}{2.3}.\frac{2.5}{3.4}.\frac{3.6}{4.5}....\frac{18.21}{19.20}\)
\(=\frac{1.2.3....18}{2.3.4....19}.\frac{4.5.6...21}{3.4.5....20}\)
\(=\frac{1}{19}.\frac{21}{3}\)
\(=\frac{1}{19}.7=\frac{7}{19}\)
Ủng hộ mk nha !!! ^_^
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Tinh hop li neu co the
(3,25+7,35) . (6-1,2)- 2,4
35,16 -44,84 : 4 + 15,6 . 24
=10,5.4,8-2,4
=50,4-2,4
=48
=35,16-11,21+374,4
=23,95+374,4
=398,35
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thuc hien phep tinh bang cach hop li neu co the 30-[50-(9-4)2]+20150
30-[50-(9-4)2]+20150
=30-[50-52]+20150
=30-[50-25]+20150
=30-25+20150
=30-25+1
=5+1
=6
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A=-[-806-(-791)+2012]-(806-1791)
B=9-(119).34+119.(-77)-(-119).11
C=-(-2^4)+(-3)^3-(-1)^2011
tinh hop li (neu co the)
giup mik voi ! Ai dung mik tick cho
A = - [-806 - (-791) + 2012] - (806 - 1791)
A = 806 - 791 + 2012 - 806 + 1791
A = (806 - 806) + (1791 - 791)
A = 1000
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B = 9 - (119).34 + 119.(-77) - (-119).11
B = 9 - 119(34 + 77 - 11)
B = 9 - 119.100
B = 9 - 11900
B = - 11891
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C = -( -24) + (-3)3 - (-1)2011
C = 16 - 27 + 1
C = (16 + 1) - 27
C = 17 - 27
C = -10
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