370×25+370×74+370

= 370 x ( 25 + 74 +1)

= 370 x 100

= 37000

=370 nhân [25+74+1]

=37000

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 +-*/

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

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

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

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

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

\(=1+1+1\)

\(=3\)

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

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

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

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

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

\(306\cdot41+58\cdot306+306\)

\(=306\cdot\left(41+58+1\right)\)

\(=306\cdot100=30600\)

306*41+58*306+306

=306*(41+58+1)

=306*100=30600

\(108\times5+108\times96-108=108\times\left(5+96-1\right)\)

                                                              \(=108\times100=10800\)

`108xx5+108xx96-108`

`=108xx(5+96-1)`

`=108xx100`

`=10800`

ko cần lời giải nhé

(3+2-5) x 4/15= 0 x 4/15 = 0