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=(1/11 + 4/11) + (3/4 + 1/4)
=5/11 + 4/4
=5/11+1
=5/11+ 11/11
=16/11
\(\frac{1}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}\)
\(=\left(\frac{1}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)\)
\(=\frac{5}{11}+1\)
\(=1\frac{5}{11}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{21}{11}.\frac{22}{17}.\frac{68}{63}=\frac{21.22.68}{11.17.63}=\frac{21.11.2.4.17}{11.17.3.21}=\frac{\left(21.11.17\right).\left(2.4\right)}{\left(11.17.21\right).3}=\frac{2.4}{3}=\frac{8}{3}\)
\(\frac{5}{14}.\frac{7}{13}.\frac{26}{25}=\frac{5.7.26}{14.13.25}=\frac{5.7.13.2}{7.2.13.5.5}=\frac{5.7.13.2}{5.7.13.2.5}=\frac{2}{2.5}=\frac{1}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
12,35 + 1,42 - 11,35 + 8,58
= (12,35 - 11,35) + (1,42 + 8,58)
= 1 + 10
= 11
12,35 + 1,42 - 11,35 + 8,58
= 12,35 + (1,42 - 11,35 ) + 8,58
= 12,35 - 9,93 + 8,58
= 2,42 + 8,58
= 11
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(8,9 x 14,7 + 2,5 x 14,7) x (34 x 11 - 3400 x 0,1 - 34)
= (8,9 x 14,7 + 2,5 x 14,7) x (34 x 11 - 3400 : 10 - 34)
= [14,7 x (8,9 + 2,5)] x (34 x 11 - 34 x 10 - 34 x 1)
= (14,7 x 11,4) x [34 x (11 - 10 - 1)]
= (14,7 x 11,4) x (34 x 0)
= 0
( 14,7 x(8,9 + 2,5) ) x (34 x (11-100x0,1-1 )
=(14,7x11,4)x(34.(11-10-1))
=(14,7x11,4)x(34.0)
=(14,7x11,4)x0
=0
![](https://rs.olm.vn/images/avt/0.png?1311)
\(20,22\times18,6+20,22\times0,394+40,4\times21\)
\(=20,22\times\left(18,6+0,394\right)+40,4\times21\)
\(\approx384,06+848,4=1232,46\)
12345678900976543234567890987654321234567899999999998765x
12345678900987654325678909876543234567899876234567890999
giúp mình nhé
=75,9 x ( 11-1 )
=75,9 x 10
=759
= 75,9 x 11 - 75,9 x 1
= 75,9x [11-1]
= 75,9 x 10
= 759
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