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104 x (14 + 6 )
= 104 x 20
= 2080
67 x 136 + 33 x 136
= ( 67 + 33 ) x 136
= 100 x 136
= 13600
51 x 115 - 115 x 41
= ( 51 - 41 ) x 115
= 10 x 115
= 1150
104 x ( 14+6 )
= 104 x 20
= 104 x 10 x 2
1040 x 2 =2080 k nha mình đang âm
a, = \(\frac{11}{21}\)x \(\left(\frac{7}{4}+\frac{5}{4}\right)\)
= \(\frac{11}{21}\)x 3
= \(\frac{33}{21}\)
b) = \(\left(\frac{23}{14}-\frac{9}{14}\right)\)x \(\frac{6}{13}\)
= 1 x \(\frac{6}{13}\)
= \(\frac{6}{13}\)
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= 4/5 x ( 3/7 + 6/7 - 4/14 )
= 4/5 x ( 3/7 + 6/7 - 2/7 )
= 4/5 x 7/7
= 4/5
14/3 + 6/17 + 28/17
= 14/3 + 34/17
= 14/3 + 2
= 14/3 + 6/3
= 20/3
HT
\(\frac{8}{14}+\frac{5}{12}+\frac{6}{14}+\frac{8}{12}-\frac{1}{12}\)
\(=\left(\frac{8}{14}+\frac{6}{14}\right)+\left(\frac{5}{12}+\frac{8}{12}-\frac{1}{12}\right)\)
\(=1+1=2\)
\(\frac{8}{14}+\frac{5}{12}+\frac{6}{14}+\frac{8}{12}-\frac{1}{12}\)
\(=\left(\frac{8}{14}+\frac{6}{14}\right)+\left(\frac{5}{12}+\frac{8}{12}-\frac{1}{12}\right)\)
\(=1+1=2\)
~ Hok tốt ~
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215 . 869 + 215 . 14
= 215 . ( 869 + 14 )
= 215 . 883
= 189945
Bài làm:
\(215\times869+215\times14\)
\(=215\times\left(869+14\right)\)
\(=215\times883\)
\(=189845\)
104 x ( 14 + 6 )
= 104 x 20
= 2080
104 x (14+ 6)
=104x20=2080