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\(\text{#}HaimeeOkk\)
A) \(12,4×(72,53+27,47)\)
\(=12,4×100\)
\(=1240\)
\(B)(32,42+17,58)+10,49\)
\(=50+10,49 \)
\(=60,49\)
A= 12,45x7,8+12,45x92,2
= 12,45x(7,8+92,2)
=12,45x100
=1245
B=25,89x75,2-25,89x65,2
=25,89x(75,2-65,2)
=25,89x10
=258,9
C=34,56x23,9-34,56x12,4+11,5x65,44
=34,56x(23,9-12,4)+11,5x65,44
=34,56x11,5+11,6x65,44
=11,5x(34,56+65,44)
=11,5x100
=1150
\(A=12,45.7,8+12,45.92,2\)
\(A=12,45.\left(7,8+92,2\right)\)
\(A=12,45.100\)
\(A=1245\)
\(B=25,98.75,2-25,89.65,2\)
\(B=25,89.\left(75,2-65,2\right)\)
\(B=25,89.10\)
\(B=258,9\)
\(C=34,56.23,9-34,56.12,4+11,5.65,44\)
\(C=34,56.\left(23,9-12,4\right)+11,5.65,44\)
\(C=34,56.11,5+11,5.65,44\)
\(C=11,5.\left(34,56+65,44\right)\)
\(C=11,5.100\)
\(C=1150\)
a,= 12,4 x 2+12,4x8
= 12,4x(2+8)
= 12,4x10
=124
b, = 0,9x95+0,9x2x2+0,9x1
= 0,9x(95+2+2+1)
= 0,9x100
= 90
tick nha bạn
a. =12.4*(2+8) = 12.4*10= 124
b. 0.9* ( 95+4+1 ) =0.9*100= 90
Tick nha!!!!!!!!! Thank you
12,4 - (x - 10) : x = 11,6
=> (x - 10) : x = 12,4 - 11,6
=> (x - 10) : x = 0,8
=> x - 10 = 0,8x
=> x - 0,8x = 10
=> (1 -0,8)x = 10
=> 0,2x = 10
=> x = 10 : 0,2 = 50
\(12,4-\frac{x-10}{x}=11,6\)
\(\frac{x-10}{x}=12,4-11,6\)
\(\frac{x-10}{x}=0,8\)
\(\frac{x}{x}-\frac{10}{x}=0,8\)
\(1-\frac{10}{x}=0,8\)
\(\frac{10}{x}=1-0,8\)
\(\frac{10}{x}=0,2\)
\(x=\frac{10}{0,2}=50\)
1240
60.49
tik mik nha
1) 12,4x72,53+27,47x12,4
= 12,4x(72,53+27,47)
= 12,4 x 100
=1240
2) 32,42+ 10,49+ 17,58
= (32,42+17,58) + 10,49
= 50 + 10,49
= 60,49