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a, 3 6 : 3 4 + 5 2 . 5 + 1 2018 = 3 2 + 5 3 + 1 = 9+125+1 = 135
b, 24:{300:[375 – (150+5.15)]}
= 24:{300:[375 – 225]} = 24:{300:150} = 24 : 2 = 12
ok
24 : {300 : [375 - (150 + 15 x 5)
= 24 : {300 : [375 - (150 + 75)
= 24 : [300 : (375 - 225)]
= 24 : (300 : 150)
= 24 : 2
= 12
a) 17*85+17*15-120
=17*(85+15)-120
=17*100-120
=1700-120
=1580
b)2.31.12+4.6.42+8.27.3
=24.31+24.42+24.27
=24.(31+42+27)
=24.100
=2400
c)24:{300:[375-(150+5*15)]}
=24:{300:[375-(150+75)]}
=24:[300:(375-225)]
=24:(300:150)
=24:2
=12
a, \(24:\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)
\(=24:\left\{300:\left[375-\left(150+325\right)\right]\right\}\)
\(=24:\left\{300:\left[375-225\right]\right\}\)
\(=24:\left\{300:150\right\}\)
\(=24:2=12\)
b, \(1449:\left[\left(216+184\right):8\right].9\)
\(=1449:\left[400:8\right].9\)
\(=1449:50.9\)
\(=28,98.9=260,82\)
c, \(222+224+......+444\)
\(=\dfrac{\left[\left(444-222\right):2+1\right]\left(444+222\right)}{2}\)
\(=37264\)
d, \(127.36+64.127-127.100\)
\(=127\left(36+64-100\right)\)
\(=127.0=0\)
24:\(\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)
=24:\(\left\{300:\left[375-15.\left(10-5\right)\right]\right\}\)
=24:\(\left\{300:\left[15.25-15.5\right]\right\}\)
=24:\(\left\{300:\left[15.\left(25-5\right)\right]\right\}\)
=24:\(\left\{300:\left[15.20\right]\right\}\)
=24:\(\left\{300:300\right\}\)
=24:1=24
1449-[216-184:8).9]
=1449-[216-23).9]
=1449-(193.9)
=1449-1737
=-288
24 : { 300 : [ 375 ( 150 + 15 . 5 ) ] }
24 : { 300 : [ 375 ( 150 + 75 ) ] }
24 : [ 300 : ( 375 . 225 ) ]
24 : ( 300 : 84375 )
24 : 4/1125
= 6750
a) \(6^2:4\times3+2\times5^2\)
\(=36:4\times3+2\times25\)
\(=9\times3+50\)
\(=27+50\)
\(=77\)
b) \(125+70+375+230\)
\(=\left(125+375\right)+\left(70+230\right)\)
\(=500+300\)
\(=800\)
c) \(150:\left[25\times\left(18-4^2\right)\right]\)
\(=150:\left[25\times\left(18-16\right)\right]\)
\(=150:\left[25\times2\right]\)
\(=150:50\)
\(=3\)
24:{300:[375-(150+3.5^2)]}
=24:{300:[375-(150+3.25)]}
=24:{300:[375-(150+75)]}
=24:{300:[375-225]}
=24:{300:150}
=24:2
=12