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-425-(-67+75-452)
=-425+67-75+452
=-(425+75)+(67+452)
=(-500)+519
=19
`600:{30:[401-(4.153-4.53)]}`
`600:{30:[401-(4.(153-3))]}`
`=600:[30:(401-4.100)]`
`=600:(30:1)`
`=600:30=20`
\(600:\left\{30:\left[401-\left(4.153-4.53\right)\right]\right\}\)
\(=600:\left\{30:\left[401-\left(4.\left(153-53\right)\right)\right]\right\}\)
\(=600:\left\{30:\left[401-\left(4.100\right)\right]\right\}\)
\(=600:\left\{30:\left[401-400\right]\right\}\)
\(=600:\left\{30:1\right\}\)
\(=600:30\)
\(=20\)
\(=600:\left\{450:\left[450-\left(500-200\right)\right]\right\}\)
\(=600:\left\{450:\left[450-300\right]\right\}\)
\(=600:3=200\)
=600:{450:[450-(4.125-8.25)]}
=600:{450:[450-(8.125-4.25)]}
=600:{450:[450-300]
=600:{450:150}
=600:3
=200
Lần sau bn nhớ ghi đúng thứ tự ngoặc nhé
\(100:\left\{250:\left[450-\left(4\cdot5^3-2^2\cdot25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(4\cdot125-4\cdot25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(500-100\right)\right]\right\}\)
\(=100:\left[250:\left(450-400\right)\right]\)
\(=100:\left(250:50\right)\)
\(=100:5\)
\(=20\)
\(2^3.15-\left[115-\left(12-5\right)^2\right]=8.15-\left[115-7^2\right]=120-\left[115-49\right]=120-66=54\)
\(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}=100:\left\{250:\left[450-\left(4.125-4.25\right)\right]\right\}=100:\left\{250:\left[450-\left(500-100\right)\right]\right\}\)
\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)
a, 600 : { 450 : 450 - 4 . 5 3 - 2 3 . 5 2 }
= 600:{450:[450 - (4.125 - 8.25)]} = 600:{450:[450 - (500 - 200)]}
= 600:{450:[450 - 300]} = 600:{450:150} = 600:3 = 200
b, 18 . { 420 : 6 - 150 - ( 68 . 2 - 2 3 . 5 ) }
= 18.{70 - [150 - (68.2 - 8.5)]} = 18.{70 - [150 - (136 - 40)]}
= 18.{70 - [150 - 96]} = 18.{70 - 54} = 18.16 = 288
25.(32+47)-32.(25+47)
= 25.32 + 47.25 - 32.25 +47.32
= 32,(25-25) + 47.(25-32)
= 47.(-7)
= -329
\(4\cdot5^3-32:2^5\)
\(=4\cdot125-32:32\)
\(=500-1\)
\(=499\)
#\(Toru\)
cảm ơn bạn nhé