400 x 125
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a, 50 < x + 13 < 100 - 48
50 < x + 13 < 52
=> 50 < 51 < 52
=> x + 13 = 51
x = 52 - 13 => x = 39
512-(88)-400-125
=2601-(88)-400-125
=2601-88-400-125
=2513-400-125
=2113-125
=1988
a) 4.25-12.5+170:10
=100-60+17
=40+17
=57
b) (7+33:32).4-3
=(7+3).4-3
=10.4-3
=40-3
=37
c) 12:{400:[500-(125+25.7)]}
=12:{400:[500-(125+175)]}
=12:{400:[500-300]}
=12:{400:200}
=12:2
=6
d) 168+{[2.(24+32)-2560]:72}
=168+{[2.(16+9)-1]:49}
=168+{[2.25-1]:49}
=168+{[50-1]:49}
=168+{49:49}
=168+1
=169
\(125\left(-36\right)+\left(-36\right)\left(-52\right)+36\left(-27\right)+\left(-400\right)\)
\(=-36\left(125-52+27\right)+\left(-400\right)\)
\(=-36\cdot100-400\)
=-3600-400
=-4000
125(−36)+(−36)(−52)+36(−27)+(−400)
=−36(125−52+27)+(−400)
=−36⋅100−400
=-3600-400
=-4000
a) \(28.192+72.192+2022\)
\(=192.\left(28+72\right)+2022\)
\(=192.100+2022\)
\(=19200+2022\)
\(=21222\)
_________
d) \(6:\left\{400:\left[500-\left(125+25.7\right)\right]\right\}\)
\(=6:\left\{400:\left[500-300\right]\right\}\)
\(=6:\left\{400:200\right\}\)
\(=6:2\)
\(=3\)
\(#Wendy.Dang\)
\(c,28\cdot192+72\cdot192+2022\)
\(=192\cdot\left(28+72\right)+2022\)
\(=192\cdot100+2022\)
\(=19200+2022\)
\(=21222\)
\(d,6:\left\{400:\left[500-\left(125+25\cdot7\right)\right]\right\}\)
\(=6:\left\{400:\left[500-\left(125+175\right)\right]\right\}\)
\(=6:\left[400:\left(500-300\right)\right]\)
\(=6:\left(400:200\right)\)
\(=6:2\)
\(=3\)
#Toru
12 : { 400 : [500 – (125 + 25 . 7)]}
12 : { 400 : [500 – (125 + 175]}
12 : { 400 : [500 – 300]}
12 : { 400 : 200}
12 : 2 = 6
\(12\div\left(400\left[500-\left(125+25.7\right)\right]\right)]\)
12 : ( 400 : [ 500 - ( 125 + 175 ]}
12 : ( 400 : [ 500 - 300 ]}
12 : ( 400 : 200 )
12 : 2 = 6
\(125-25.\left(x-1\right)=100\)
\(\Leftrightarrow25.\left(x-1\right)=125-100\)
\(\Leftrightarrow25.\left(x-1\right)=25\)
\(\Leftrightarrow x-1=25:25\)
\(\Leftrightarrow x-1=1\)
\(\Leftrightarrow x=1+1\Rightarrow x=2\)
\(41.69+59.133+184-400\)
\(\Leftrightarrow2829+7847+184-400\)
\(\Leftrightarrow10676+184-400\)
\(\Leftrightarrow10860-400\)
\(=10460\)
\(a,400:25=16\)
\(b,864:125=6,912\)
\(c,165:15=11\)
\(d,143:13=11\)
50000
50000