65,42 76,4 + 23,6 x 32,71 x 2
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65,42 . 3,5 : 3434,55
= 228,97 : 3434,55
= 1/15
chúc bạn học tốt !!!
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x:10+x*9,9=23,6
x*1/10+x*9,9 =23,6
x*(1/10+9,9)=23,6
x*10=23,6
x=23,6/10
x=2,36
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\(=25,6.23,6+49,5.2.25,6+25,6\)
\(=25,6.23,6+99.25,6+25,6\)
\(=25,6\left(23,6+99+1\right)\)
\(=25,6.123,6=3164,16\)
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a)53,6x21+53,6x78+53,6
=53,6x21+53,6x78+53,6x1
= 53,6x(21+78+1)
=53,6x100
=5360
b)4,5x23,6-23,5x4,5
=4,5x(23,6-23,5)
=4,5x0,1
=0,45
chúc bạn học tốt
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124 x 52 - 124 x 42
=124x(52-42)
=124x10
=1240
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37 x 23,6 + 55 x 82,6 + 31,4 x 37 - 19,6 x 55=156084887,2 nha bn!
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0.48 x X x 0.1 = 96 X : 52 : 0.01 = 23.6-1.85
0.48 x X = 96: 0.1 X : 52 : 0.01 = 21.75
0.48 x X = 960 X : 52 = 21.75 *0.01
X = 960 : 0.48 X : 52 = 0.2175
X = 2000 X = 0.2175 *52
X = 11.31
65,42 76,4 ?? số j kì vậy
terq2