370×25+370×74+370

= 370 x ( 25 + 74 +1)

= 370 x 100

= 37000

=370 nhân [25+74+1]

=37000

= (4x0,25)x15,6

= 1x15,6

=15,6

4 x 15,6 x 0,25

\(=\left(4\times0,25\right)\times15,6=1\times15,6=15,6\)

3,45x0,99+3,45:100=\(3,45\times\frac{99}{100}+3,45\times\frac{1}{100}\)

                             =\(3,45\times\left(\frac{99}{100}+\frac{1}{100}\right)\)

                             =\(3,45\times1\)

                              =3,45

ok chưa bạn?

3,45x0,9+3,45:100= \(3,45\times\frac{9}{10}+3,45\times\frac{1}{100}\)

                          =\(3,45\times\left(\frac{90}{100}+\frac{1}{100}\right)\)

                           =\(3,45\times\frac{91}{100}\)

                           =3,1395

chúc bạn học tốt +-*/

mình xin lỗi bằng 0,99 câu sửa lại giùm mình rồi mình tích cho

7/19 . 1/3 + 7/19 . 2/3 =7/19 .(1/3 + 2/3)= 7/19 . 1 = 7/19

7/19x⅓+7/19x2/3

\(0,75.95+1,5.2+0,75=0,75.95+0,75.2.2+0,75\)

\(=0,75.95+0,75.4+0,75=0,75.\left(95+4+1\right)=0,75.100=75\)

0,75 x 95 + 1,5 x 2 + 0,75 

= 0,75 x 95 + 0, 75 x 2 x 2 + 0,75 x 1 

= 0,75 x 95 + 0,75 x 4 + 0,75 x 1 

= 0,75 ( 95 + 4 + 1 ) 

= 0,75 x 100 

= 75 

a) 425 x 3475 + 425 x 6525
= 425 x (3475 + 6525)
= 425 x 10000
= 4250000
b) 175 x 1274 - 175 x 273 - 175
= 175 x 1274 - 175 x 273 - 175 x 1
= 175 x (1274 - 273 - 1)
= 175 x 1000
= 175000

a) \(2,23\cdot0,1+3,34:10+1:10\cdot4,43\)

\(=2,23\cdot0,1+3,34\cdot0,1+4,43\cdot0,1\)

\(=0,1\cdot\left(2,23+3,34+4,43\right)\)

\(=1\)

b) \(4,5:100+5,4\cdot0,01+1:100\cdot0,1\)

\(=4,5\cdot0,01+5,4\cdot0,01+0,1\cdot0,01\)

\(=0,01\left(4,5+5,4+0,1\right)\)

\(=0,1\)

\(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{4}{6}+\frac{9}{12}+\frac{16}{20}\)

\(=\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{2}{3}+\frac{3}{4}+\frac{4}{5}\)

\(=\left(\frac{1}{3}+\frac{2}{3}\right)+\left(\frac{1}{4}+\frac{3}{4}\right)+\left(\frac{1}{5}+\frac{4}{5}\right)\)

\(=\frac{3}{3}+\frac{4}{4}+\frac{5}{5}\)

\(=1+1+1\)

\(=3\)

\(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{4}{6}+\dfrac{9}{12}+\dfrac{16}{20}\)

\(=\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{2}{3}+\dfrac{3}{4}+\dfrac{4}{5}\)

\(=\left(\dfrac{1}{3}+\dfrac{2}{3}\right)+\left(\dfrac{1}{4}+\dfrac{3}{4}\right)+\left(\dfrac{1}{5}+\dfrac{4}{5}\right)\)

\(=\dfrac{3}{3}+\dfrac{4}{4}+\dfrac{5}{5}\)

\(=1+1+1=3\)