32,12 x 00,01 = 0,3212

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) 4,37 x 4 x 2,5

=4,37x(4x2,5)

=4,37x10

=43,7

b) 12,45 x 95 + 12,45 x 4 + 12,45

=12,45 x 95 + 12,45 x 4 + 12,45 x 1

=12,45 x (95+4+1)

=12,45 x 100

=1245

75,8 + 249,19 = 324,99

60  –  12,45 = 47,55

16,25  x  6,7 = 108,875

75,32 :  2 = 37,66

13,45;14,45;

0,125 nhỏ hơn x nhỏ hơn 1,25 ,x bằng bao nhiêu

A = (12,45 +  7,55)+6,98 

=20+6,98=26,98

B = 9,3 x (6,7 + 3,3 )

=9,3 x 10=93

a)

=(12,45+7,55)+6,89

=20+6,89

=26,89

b)

=9,3.(6,7+3,3)

=9,3.10

=93

= 12,45 : 4 + 87,55 : 4

= 3,1125 + 87,55 : 4

= 3,1125 + 21,8875

= 25

nhk k cho mik nhé

12,45 x 0,25 + 87,55 : 4

=12,45 x 0,25 + 87,55 x 0,25

=(12,45 + 87,55) x 0,25

=100 x 0,25

=25

\(12,45\times x-0,45\times x+x=3,9.\)

\(\Leftrightarrow x\times\left(12,45-0,45+1\right)=3,9.\)

\(\Leftrightarrow x\times13=3,9.\)

\(\Leftrightarrow x=0,3.\)

Vậy \(x=0,3.\)