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1, (30 x 5 - 24 x 4) x 32 : (30 + 20)
= 54 x 32 : 50
= 1728 : 50
= 34,56
2, (12 x 6 + 108) x 15 + 135 : 45
= 180 x 15 + 135 : 45
= 2700 + 135 : 45
= 2700 + 3
= 2703
3, 807 + 49 x (311 - 4807 : 23)
= 807 + 49 x 102
= 807 + 4998
= 5805
4 , ( 4,72 + 3,57 x 4,1 + 8,5 x 2,434) x 100
= 40,046 x 100
= 4004,6
5, (23,79 : 7,8 - 6,8 : 417) x 3,04 - 2,04
= 2,65 x 3,04 - 2,04
= 8,056 - 2,04
= 6,016
a: =24*1000=24000
b: =120*1000=120000
c: =72(135+65):25-140
=72*8-140=436
d: =18(957-354-621):72=-9/2
a: \(\dfrac{1}{8}\cdot\dfrac{4}{5}:\dfrac{3}{5}=\dfrac{1}{10}\cdot\dfrac{5}{3}=\dfrac{1}{2\cdot3}=\dfrac{1}{6}\)
b: \(=\dfrac{8-3}{12}\cdot\dfrac{6}{5}=\dfrac{6}{12}=\dfrac{1}{2}\)
c: \(=\dfrac{24}{35}:\dfrac{32}{35}=\dfrac{3}{4}\)
d: =63/21+15/21-7/21=71/21
a \(\dfrac{1}{8}\times\dfrac{4}{5}\times\dfrac{10}{6}=\dfrac{1}{6}\)
b \(\left(\dfrac{8}{12}-\dfrac{3}{12}\right)\times\dfrac{6}{5}=\dfrac{5}{12}\times\dfrac{6}{5}=\dfrac{1}{2}\)
c \(\dfrac{24}{35}:\dfrac{32}{35}=\dfrac{24}{35}\times\dfrac{35}{32}=\dfrac{3}{4}\)
d \(\dfrac{63}{21}+\dfrac{15}{21}-\dfrac{7}{21}=\dfrac{71}{21}\)
35 x 146 - 7 x 46 x 5 24 x 35 + 35 x 76
= 35 x 146 - 7 x 5 x 46 = 35 x ( 24 + 76 )
= 35 x 146 - 35 x 46 = 35 x 100
= 35 x ( 146 - 46 ) = 3500
= 35 x 100
= 3500
= 35 x ( 146 - 46) / 35 x ( 24 + 76)
= 35 x 100 / 35 x 100
= 1
a) 135 x (20 + 3)
= 135 x 20 + 135 x 3
= 2700 + 405 = 3105
427 x (10 + 8)
= 427 x 10 + 427 x 8
= 4270 + 3416 = 7686
b) 642 x (30 -6)
= 642 x 30 - 642 x 6
= 19260 - 3852 = 15408
287 x (40 -8)
= 287 x 40 - 287 x 8
= 11480 - 2296 = 9184
\(a,8\times427\times3+6\times573\times4\)
\(=24\times427+24\times573\)
\(=24\times\left(427+573\right)\)
\(=24\times1000\)
\(=24000\)
\(b,6\times1235\times20-5\times235\times24\)
\(=120\times1235-120\times235\)
\(=120\times\left(1235-235\right)\)
\(=1235\times1000\)
\(=1235000\)
a) x=24/35 -2/7
x=14/35
b) x=7/8+5/6
x=41/24
c) x-11/5=3/5
x=11/5+3/5
x=14/5
tick cho mình nhé
\(8\cdot427\cdot3+6\cdot573+46\cdot1235\cdot20-5\cdot235\cdot24\)
\(=4\cdot2\cdot427\cdot3+6\cdot573+23\cdot2\cdot1235\cdot20-5\cdot235\cdot4\cdot3\cdot2\)
\(=4\cdot427\cdot6+6\cdot573+23\cdot2\cdot247\cdot5\cdot20-20\cdot5\cdot47\cdot3\cdot2\)
\(=6\cdot\left(4\cdot427+573\right)+23\cdot247\cdot200-47\cdot3\cdot200\)
\(=6\cdot\left(1708+573\right)+23\cdot\left(200+47\right)\cdot200-47\cdot3\cdot200\)
\(=6\cdot2281+23\cdot200\cdot200+23\cdot47\cdot200-47\cdot3\cdot200\)
\(=13686+23\cdot40000+20\cdot200\cdot47\)
\(=13686+920000+4000\cdot47\)
\(=13686+920000+188000\)
\(=13686+\left(920000+188000\right)\)
\(=13686+1108000=1121686\)
trời ơi là trời
làm đúng mà dis
mệt quá là mệt
thằng mô dis tui hử khai mau
tui dis hết luôn cho mà coi
6 x 135 x 20 - 5 x 35 x 24
= ( 6 x 5 ) x ( 135 x 20 ) - ( 35 x 24 )
= 30 x 2700 - 840
= 81 000 - 840
= 80 160
:33
bn bớt :33 vs ạ?