= 25 x 75/100 + 75 x 0.92 + 25 x 0.25 + 75 x 8/100
= 25 x 0.75 + 75 x 0.92 + 25 x 0.25 + 75 x 0.08
= 25 x ( 0.75 + 0.25 ) + 75 x ( 0.92 + 0.08 )
= 25 x 1 + 75 x 1 
= ( 25 + 75 ) x 1 
= 100 x 1
= 100

75x174 -75 x 75 +75

=75x (174-75+1)

=75x100

=7500

 75.174 - 75.75 + 75

= 75. (174 - 75) + 75

= 75. 99 + 75

= 7425 + 75

= 7500

75 x 174 - 75  x 75 + 75

= 75 x 174 - 75  x 75 + 75 x 1

= 75 x ( 174 - 75 + 1 )

=75 x 100

7500

a. 75,24 x 99 + 75,24

= 75,24 x 99 + 75,24 x 1

= 75,24 x ( 99 + 1 )

= 75,24 x 100

= 7524

b. 32,421 + 32,421 x 98 + 32,421 

= ( 32,421 + 32,421 ) + 32,421 x 98

= 32,421 x 2 + 32,421 x 98

= 32,421 x ( 2 + 98 )

= 32,421 x 100

= 3242,1

a) 75,24 x 99 + 75,24

= 75,24 x (99 + 1)

= 75,24 x 100

= 7524

b) 32,421 + 32,421 x 98 + 32,421

= 32,421 x (98 + 1 + 1)

= 32,421 x 100

= 3242,1

a . 75,24 x 99 + 75,24

=75,24 x (99+1)

=75,24 x 100

=7524

b.32,421+32,421 x 98 +32.421

=32,421 x (1+98+1)

=32,421 x 100

3242,1

35 x 3/4 + 45,5 x 75/100 + 20,5 x 75% - 0,75

= 35 x 0,75 + 45,5 x 0,75 + 20,5 x 0,75 - 0,75 x 1

= ( 35 + 45,5 + 20,5 - 1 ) x 0,75

= 100 x 0,75

= 75

\(\dfrac{3}{4}+0,75+\dfrac{75}{100}\)

=\(0,75+0,75+0,75\)

=\(0,75\)x\(3\)

=\(2,25\)

3/4 + 0,75 + 75%

=0,75 + 0,75 + 0,75

=0,75 × 3

=2,25

tính nhanh 

0,8 * 2 +1,6 *98 + 0,4*4

(25x36):9+450-75-25

= 900 : 9 + 450 - 75 -25

= 100 + ( 450 - 75-25)

= 100 + 350

= 450

450

=450

\(75\times34+75+65\times75\)

\(=75\times\left(1+34+65\right)\)

\(=75\times\left(35+65\right)\)

\(=75\times100\)

\(=7500\)

75/100 + 3/4 x 29 + 75% x 30 + 0,75 x 40

= 0,75 + 0,75 x 29 + 0,75 x30 + 0,75 x 40

= 0,75 x ( 1 + 29 + 30 + 40 )

= 0,75 x 100

=75

\(\frac{75}{100}+\frac{3}{4}\times29+75\%\times30+0,75\times40\)

\(=\frac{75}{100}\times1+\frac{3\times25}{4\times25}\times29+\frac{75}{100}\times30+\frac{0,75}{1}\times40\)

\(=\frac{75}{100}\times1+\frac{75}{100}\times29+\frac{75}{100}\times30+\frac{0,75\times100}{1\times100}\times40\)

\(=\frac{75}{100}\times1+\frac{75}{100}\times29+\frac{75}{100}\times30+\frac{75}{100}\times40\)

\(=\frac{75}{100}\left(1+29+30+40\right)\)

\(=\frac{75}{100}\times100\)

\(=\frac{75}{100}\times\frac{100}{1}\)

\(=\frac{75}{1}\)

\(=75\)

\(=\frac{75\times100}{100\times1}\)

18,75+17,25+15,75+14,25+5,25+3,75+2,25