\(a,2^2.3^2-5.23\)
\(=4.9-115\)
\(=36-115\)
\(=-79\)
\(b,5^2.2+20:2^2\)
\(=25.2+20:4\)
\(=50+5=55\)
a)22. 32-5 . 23
= 4 . 9 - 5 . 23
= 36 - 115
= -79
b)52. 2 + 20 : 22
= 25 . 2 + 20 : 4
= 50 + 5
= 55
c)18 . { 420 : 6+ [150 - ( 68.2 - 23 .5)]}
= 18 . { 70 + [ 150 - ( 136 - 40 ) ] }
= 18 . { 70 + [ 150 - 96 ] }
= 18 . { 70 + 54 }
= 18 . 124
= 2232
Chúc bạn hok tốt!
a)22. 32-5 . 23
=4.9-5.23
=36-115
=-79
b)52. 2 + 20 : 22
= 25.2+20:4
=50+5
=55
c)18 . { 420 : 6+ [150 - ( 68.2 - 23 .5)]}
=18.{70+[150-(136-40)]}
=18.{70+[150-96]}
=18.{70+54}
=18.124
=2232
\(c,18.\left\{420:6+\left[150-\left(68.2-2^3.5\right)\right]\right\}\)
\(=18.\left\{7+\left[150-\left(136-40\right)\right]\right\}\)
\(=18.\left\{7+\left[-26\right]\right\}\)
\(=18.\left(-19\right)\)
\(=-342\) ko chắc :v
\(a,2^2.3^2-5.23\) \(b,5^2.2+20:2^2\)
\(=4.9-115\) \(=25.2+20:4\)
\(=36-115\) \(=50+5\)
\(=-79\) \(=55\)
\(c,18.\left\{420:6+\left[150-\left(68.2-2^3.5\right)\right]\right\}\)
\(=18.\left\{420:6+\left[150-\left(136-8.5\right)\right]\right\}\)
\(=18.\left\{420:6+\left[150-\left(136-40\right)\right]\right\}\)
\(=18.\left\{420:6+\left[150-96\right]\right\}\)
\(=18.\left\{420:6+54\right\}\)
\(=18.\left\{70+54\right\}\)
\(=18.124\)
\(=2232\)
