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100:{250:[450-(4.53-22.25)}]
=100:{250:[450-(500-100)]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
100:{250:[450-(4.5^3-2^2.25)]}
=100:{250:[450-(4.125-4.25)]}
=100:{250:[450-(500-100)]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
~Chúc học tốt!~
\(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)
= \(100:\left\{250:\left[450-\left(2^2.5^3-2^2.5^2\right)\right]\right\}\)
= \(100:\left\{250:\left[450-2^2.5^2\left(5-1\right)\right]\right\}\)
= \(100:\left[250:\left(450-100.4\right)\right]\)
=\(100:\left(250:50\right)\)
= \(100:5\)
= \(20\)
a) \(4.5^2-81:3^2=4.25-81:9=100-9=91\)
b) \(3^3.23-3^3.19=3^3.\left(23-19\right)=27.4=108\)
c) \(2^4.5-[131-\left(13-4\right)^2]=16.5-\left(131-9^2\right)=80-\left(131-81\right)=80-50=30\)
d) \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)
\(=100:\left[250:\left(450-4.100\right)\right]\)
\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)
100:{250:[450-(4.53-22.25)}]
=100:{250:[450-(500-100)]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
1) 100 : { 250 : [ 450 - ( 4 x 53 - 22 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 4 x 125 - 4 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 500 - 100 ) ] }
= 100 : [ 250 : ( 450 - 400 ) ]
= 100 : ( 250 : 50 )
= 100 : 5
= 20
2) 30 : { 175 : [ 355 - ( 135 + 37 x 5 ) ] }
= 30 : { 175 : [ 355 - ( 135 + 185 ) ] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
chúc bạn học giỏi
1) 100 : { 250 : [ 450 - ( 4 x 53 - 22 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 4 x 125 - 4 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 500 - 100 ) ] }
= 100 : [ 250 : ( 450 - 400 ) ]
= 100 : ( 250 : 50 )
= 100 : 5
= 20
2) 30 : { 175 : [ 355 - ( 135 + 37 x 5 ) ] }
= 30 : { 175 : [ 355 - ( 135 + 185 ) ] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
a) Đề:........
= 18. (73 + 15 + 12)
= 18. 100
= 18000
b) Đề nên sửa 23 thành 25
= 100 : { 250 : [ 450 - (4. 125 - 4.25)]}
= 100 : { 250 : [ 450 - (500 - 100)]}
= 100 : { 250 : [ 450 - 400 ]}
= 100 : { 250 : 50 }
= 100 : 5
= 20
a) 18.73+15.18+12.18
=18.(73+15+12)
=18.100
=1800
b) (37+63):{250:[450-(4.53-22.23)]}
=(37+63):{250:[450-(22.53-22.23)]}
=100:{250:[450-22.(53-23)]}
=100:{250:[450-22.102]}
=100:{250:[450-408]}
=100:{250:42}
=100:\(\frac{125}{21}\)
=\(\frac{84}{5}\)
=( 21999+21999.25): (21990+9)
=21999.(1+25): 21999
=21999.(1+25): 21999
=21999. (1+25): 21999
=1.(1+32)
=1.33
=33
tìm x
a) 7(x-4)3+30=219
7(x-4)3=219-30
7(x-4)3=189
(x-4)3=189:7
(x-4)3=27
(x-4)3=33
x-4=3
x=3+4
x=7
b,720:[41(2.x-5)]=40
41(2.x-5)=720:40
41(2.x-5)=18
2.x-5=18:41
2.x-5=\(\frac{18}{41}\)
2.x=\(\frac{18}{41}\)+5
2.x=\(\frac{223}{41}\)
x=\(\frac{223}{41}\):2
x=\(\frac{223}{82}\)
Tính
c)100:{250:[450-(4.53-22.25]}
=100:{250:[450-(4.125-4.25]}
=100:{250:[450-[500-100]}
=100:{250:[450-400]}
=100:{250:50}]
=100:50
=2
(li-ke cho mình nha)
-15 +40 = 40-15=25
-100-(-100) =100 -100=0
(-5).75+(-5).25=(-5).(75+25)= - 500
33 +2016o.(-5) = 27+1.(-5) = 22
tinh nhanh;
(-27)+42+18+27 = 2(8+9) =34
(-10-20).(-5) = (-30).(-5) =150
\(100:\left\{250:\left[450-\left(4.5^3-2^5.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(500-800\right)\right]\right\}\)
\(=100:\left\{250:\left[450+300\right]\right\}\)
\(=100:\left\{250:700\right\}\)
\(=100:\frac{5}{14}\)
\(=280\)
100:{250:[450 - ( 4 . 125 - 4.25 )]}
100: { 250: [ 450 - ( 500 - 100 ) ]}
100: {250:[ 450 - 400]
100: { 250 : 50 }
100: 5 = 20