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

35 x 3/4 +45,5 x 75/100 + 20,5 x75% - 0,75 

= 35. 0,75 + 45,5 . 0,75+ 20,5 . 0,75 - 0,75.1

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

= 0,75.100

= 75

B. 173 + 45 + 135 + 27 + 50 

= (173+27) + (45 +135) +50

=200 + 180 + 20 + 30

= 200 +200 +30

=430

bằng 500 chứ câu a ấy

A. 35+156+21+75+179+44

=(35+75)+(156+44)+(21+179)

=100+200+200

=500

B.173+45+135+27+50

=(173+27)+(45+125)+50

=200+180+20+30

=200+200+30

=430

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

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

=\(0,75\)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

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

75/100+75%.2+3/4.3+0.75.4

=3/4+3/4.2+3/4.3+3/4.4

=3/4.(1+2+3+4)

=3/4.10

=15/2

=75/100+75/100x2+75/100x3 +75/100 x4

=75/100x(1+2+3+4)

= 75/100x10

=15/2

hok tot

thank you mọi người nha

\(\dfrac{75}{100}\) + 0,75 x 29 + 75% x 30 + \(\dfrac{3}{4}\) x 40

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

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

= 0,75 x 100

= 75

0,75 + 0,75 x 29 + 0,75 x30 + 0,75 x 41

 0,75 x ( 1 + 29 + 30 + 41 )

0,75 x 101

75,75