\(650:25-325:25-225:25\)
\(=\left(650-325-225\right):25\)
\(=100:25\)
\(=4\)

=26-13-9=4

mong mn giúp đỡ

a: =43,8x(2,25+7,75)=43,8x10=438

b: =>12,25(121,3-a)=980

=>121,3-a=80

hay a=41,3

\(a,43.8.\left(2,25+7,75\right)=43,8.10=438\)

725 : 25 + 275 : 25

= ( 725 + 275 ) : 25

= 1000 : 25

= 40

725 : 25 + 275 : 25

= ( 725 + 275 ) : ( 25 + 25 )

= 1000 : 50

= 20

Cho minhf 1 like nha

725 : 25 + 275 : 25

= ( 725 + 275 ) : 25

= 1000 : 25

= 40

\(=\dfrac{12}{25}+\dfrac{15}{25}+\dfrac{12}{25}=\left(\dfrac{12}{25}+\dfrac{12}{25}\right)+\dfrac{15}{25}=\dfrac{24}{25}+\dfrac{15}{25}=\dfrac{39}{25}\)

= 39/25

\(\dfrac{39}{25}\)

25 x 80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25 x 80 + 25 x 8 + 25 x 10 + 25 x 2

= 25 x ( 80 + 8 + 10 + 2 )

= 25 x 100

= 2500

25 x 80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25 x 80 + 25 x 8 + 25 x 10 + 25 x 2

= 25 x ( 80 + 8 + 10 + 2 )

= 25 x 100

= 2500

25x80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25x80 + 25x8 + 25x10 + 25x2

= 25x(80 + 8 + 10 + 2)

= 25x100

= 2500

\(a.145\times565+145\times54+56\times145\)

\(=145\times\left(565+54+56\right)\)

\(=145\times675\)

\(=97875\)

\(b.225\times104\)

\(=\left(100+4\right)\times225\)

\(=22500+900\)

\(=23400\)

\(c.1000:\left(20\times25\right)\)

\(=1000:500\)

\(=2\)

\(d.\left(206\times20\right):2\)

\(=206\times\left(20:2\right)\)

\(=206\times10=2060\)

\(\text{ 725 : 25 + 525 : 25}\\ =\left(725+525\right):25\\ =1250:25\\ =50\)

\(725:25+525:25\\ =\left(725+525\right):25=1250:25=50\)

\(725:25+525:25\\ =\left(725+525\right):25\\ =1250:25\\ =50\)

a, 75 x 75 + 75 x 24 + 75

= 75 x ( 75 + 24 + 1 )

= 75 x 100

= 7500

b, 25 × 25 + 25 × 25 + 25 × 25 + 25 × 24 + 25

= 25 x ( 25 + 25 + 25 + 24 + 1 )

= 25 x 100

= 2500

c, 125 x 4 x 25 x 8

= ( 125 x 8 ) x ( 4 x 25 )

= 1000 x 100

= 100000

a) = 75 x (75+24+1)

=75 x 100

=7500

b) =25 x (25+25+25+24+25)

= 25 x 124

= 3100

c) = (125 x 8) x (25 x 4)

=1000 x 100

=100000

â) 75 nhận 24 =99 b) 25 nhận 24=600 c) (25 nhận 4) nhân 125 nhân 8 =90000

=25*125 - 25*10 - 25*5 - 25*100

=25*[125-10-5-100]

=25*10

=250

25 x 125 - 25 : 0,2 - 25 : 0,2 - 25 : 0,01 = 3125 -25 : ( 0,2 - 0,1 - 0,01 ) 

                                                          =  \(\frac{3125}{1}\) : \(\frac{2500}{9}\)

                                                           = \(\frac{45}{4}\)

                                                            =  11,25

Bạn đổi chia 0,1=nhân với10

chia 0,2 =nhân 5

chia 0,01=nhân 100