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24 : { 390 : [ 500 - ( 125 + 35 . 7 )]} - 32
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a) 463+318+137+22
= (463+137)+(318+22)
= 600+340
= 940
b) 185.32-32.85
= 32.(185-85)
= 32 . 100
= 3200
c) \(15:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\)
\(\text{= }15:\left\{390:\left[500-\left(125+245\right)\right]\right\}\)
\(\text{= }15:\left\{390:\left[500-370\right]\right\}\)
\(=15:\left(390:130\right)\)
\(\text{= }15:3\)
\(\text{= }5\)
a)\(463+318+137+22\)
\(=\left(463+137\right)+\left(318+22\right)\)
\(=600+340=940\)
b)\(185.3^2-3^2.85\)
\(=3^2.\left(185-85\right)\)
\(=9.100=900\)
c)\(15:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\)
\(=15:\left\{390:\left[500-\left(125+245\right)\right]\right\}\)
\(=15:\left\{390:\left[500-370\right]\right\}\)
\(=15:\left\{390:130\right\}\)
\(=15:3=5\)
= 12 : {390 : [500 - (125 + 245)]}
= 12 : [390 : (500 - 370)]
= 12 : (390 : 130)
= 12 : 3
= 4
12:{390:[500-(125+35.7)]}
=12:{390:[500-(125+245)]}
=12:{390:[500-370]}
=12:{390:130}
=12:3
=4
\(12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\)
\(=12:\left\{390:\left[500-370\right]\right\}\)
\(=12:\left[390:130\right]\)
\(=12:3=4\)
12 : ( 390 : ( 500 - ( 125 +35 x 7 )
= 12 : (390 : (500 - (125 + 245) ) )
= 12 : (390 : ( 500 - 370 ) )
= 12 : ( 390 : 130 )
= 12 : 3
= 4
\(12:\left(390:\left(500-\left(125+35\times7\right)\right)\right)\)
\(=12:\left(390:\left(500-370\right)\right)\)
\(=12:\left(390:130\right)\)
\(=12:3\)
\(=4\)
A = 12 : { 390 : [ 500 - ( 125 + 245 ) ] }
A = 12 : { 390 : [ 500 - 370 ] }
A = 12 : { 390 : 130 }
A = 12 : 3
A = 4
Ta có A = 12 : { 390 : [ 500 - 370 ]}
= 12 : { 390 : 130 }
= 12 : 3
= 4
12:(390:(500-(125+245)))
=12:(390:(500-370))
=12:(390:130)
=12:3
=4
\(24:\left\{390-[500-\left(125+35.7\right)]\right\}=2^x\)
\(24:\left\{390-[500-\left(125+245\right)]\right\}=2^x\)
\(24:\left\{390-[500-370]\right\}=2^x\)
\(24:\left\{390-130\right\}=2^x\)
\(24:260=2^x\)
Chỗ này sai đề ạ !
24 : { 390 - [ 500 - ( 125 + 35 . 7 ) ] } = 2x
2x = 24 : { 390 - [ 500 - ( 125 + 245 ) ] }
2x = 24 : { 390 - [ 500 - 370 ] }
2x = 24 : { 390 - 130 }
2x = 24 : 260
2x = 6/65 = ......................
=> Đề sai
12 : {390 : [500 - (125 + 35 . 7)]}
= 12 : {390 : [500 - (125 + 245)]}
= 12 : [390 : (500 - 370)]
= 12 : (390 : 130)
= 12 : 3
= 4
12 : { 390 : [ 500 - ( 125 + 35. 7 ) ] }
= 12 : { 390 : [ 500 - ( 125 + 245 ) ] }
= 12 : { 390 : [ 500 - 370 ] }
= 12 : { 390 : 130 }
= 12 : 3
= 4
24 : { 390 : [ 500 - ( 125 + 35 . 7 )]} - 32
= 24 : { 390 : [ 500 - ( 125 + 245 )]} - 9
= 24 : { 390 : [ 500 - 370 ]} - 9
= 24 : { 390 : 130} - 9
= 24 : 3 - 9
= 8 - 9 = -1
k mik nha, thank nhiều nhiều