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458 x 105 + 324 x 105 + 217 x 105 +105
= 105 x ( 458 + 324 + 217 + 1 )
= 105 x 1000
= 105000
Đây bạn nhé. Nhớ k cho mk nha
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a) \(794\times105-105:15\)
\(=83370-7\)
\(=83363\)
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a) 35 : 5 và (35 x 4) : (5 x 4)
35:5= 7
(35 x 4) : (5 x 4) = 140 : 20 =7
=> 35 : 5 = (35 x 4) : (5 x 4)
b) 105 : 15 và (105 : 5) : (15 : 5)
105:15 =7
(105 : 5) : (15 : 5)= 7 : 3= 2 (dư 1)
=>105 : 15 > (105 : 5) : (15 : 5)
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\(2016\times105-2016\times4-2016\)
\(=2016\times\left(105-4-1\right)\)
\(=2016\times100\)
\(=201600\)
\(x\times24+x\times6=240\)
\(x\times\left(24+6\right)=240\)
\(x\times30=240\)
\(x=240:30\)
\(x=8\)
\(x-167\times15=167\times185\)
\(x-2505=30895\)
\(x=30895+2505\)
\(x=33400\)
\(173\times105+173\times96-173\)
\(=173\times\left(105+96-1\right)\)
\(=173\times200\)
\(=34600\)
1. 2016 x 105 - 2016 x 4 - 2016
= 211680 - 8064 - 2016
= 203616 - 2016
= 201600
2. X x 24 + X x 6 = 240
X x (24 + 6) = 240
X x 30 = 240
X = 240 : 30
X = 8
3. X - 167 x 15 = 167 x 185
X - 2505 = 30895
X = 30895 - 2505
X = 28390
4. 173 x 105 + 173 x 96 - 173
= 18165 + 16608 - 173
= 34773 - 173
= 34600
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1260:(x:35)=105
x:35=1260:105
x:35=12
x=12x35
x=420
Vậy x=420.
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a. 86 x 121 - 86 x 22 + 86
= 86 x ( 121 - 22 + 1 )
= 86 x 100
= 8600
b. 25 x 191 - 100 + 25 x 13
= 25 x 191 - 25 x 4 + 25 x 13
= 25 x ( 191 - 4 + 13 )
= 25 x 200
= 5000
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( 1 + 9 ) x ( 500 x 105 )
= 10 x ( 500 x 105 )
= 10 x 500 x 105
= 5000 x ( 100 + 5 )
= 5000 x 100 + 5000 x 5
= 500000 + 25000
= 525000
( 1 + 9 ) x ( 500 x 105 ) = 10 x ( 500 x 105 )
= 10 x 500 x 105
= 5000 x ( 100 + 5 )
= 5000 x 100 + 5000 x 5
= 500000 + 25000
= 525000
105x105=11025 nhé
HT
11025 nha