\(a)101\times0,75-0,75\)

\(=0,75\times(101-1)\)

\(=0,75\times100=75\)

___________________________________________

`b)10:0,5+4:0,25+8:0,125`

\(=10\times2+4\times4+8\times8\)

\(=5\times4+4\times4+4\times16\)

\(=4\times(5+4+16)\)

\(=4\times25=100\)

$a)101\times 0,75-0,75$

$=0,75\times (101-1)$

$=0,75\times 100=75$

___________________________________________

$b)10:0,5+4:0,25+8:0,125$

$=10\times 2+4\times 4+8\times 8$

$=5\times 4+4\times 4+4\times 16$

$=4\times (5+4+16)$

$=4\times 25=100$

=3/4.0,25+3/4.1,25-3/4.0,5

=3/4.(0,25+1,25-0,5)

=3/4.10

=15/2

`3/4.0,25+3/4.1,25-3/4.0,5`

`=3/4.(0,25+1,25-0,5)`

`=3/4xx10=15/2`

=3/4x(0,25+1,25-0,5)=3/4x10=15/2

 b, 4 x 0,75 x 2,5

= (4 x 2,5) x 0,75

= 10 x 0,75

= 7,5

A. 5 x 25,7-25,7+25,7 x 6

=25,7x(5+1-6)

=25,7x0

=0

B. 4 x 0,75 x 2,5

=(4 x 2,5)x0,75

=10 x 0,75

=7,5

\(a,=69,78\times\left(\dfrac{3}{4}+\dfrac{1}{4}+99\right)\\ =69,78\times\left(\dfrac{4}{4}+99\right)\\ =69,78\times\left(1+99\right)=69,78\times100=6978\\ b,34,1\times8+34,1\times0,5\\ =34,1\times\left(8+0,5\right)\\ =34,1\times8,5\\ =289,85\)

a: =69,78(3/4+1/4+99)

=69,78*100

=6978

b: =34,1(8+0,5)=34,1*8,5=289,85

a.\(69,78\times\dfrac{3}{4}+69,78\times\dfrac{1}{4}+69,78\times99=69,78\times\left(\dfrac{3}{4}+\dfrac{1}{4}+99\right)=69,78\times100=6978\)

b. \(34,1\times8+34,1\times0,5=34,1\times\left(8+0,5\right)=34,1\times8,5=289,85\)

a) 19,17x25x4=19,17(25x4)=19,17x100=1917

b)1,79x(8x125)=1,79x1000=1790

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a)=2

b)=1/3

a,2

b,1/3