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

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

\(=306\cdot100=30600\)

306*41+58*306+306

=306*(41+58+1)

=306*100=30600

= 306 . (41 + 58 + 1)

= 306 . 100

= 30600

\(5\dfrac{3}{4}:3+2\dfrac{1}{4}\times\dfrac{1}{3}-\dfrac{1}{8}=\left(5\dfrac{3}{4}+2\dfrac{1}{4}\right)\times\dfrac{1}{3}-\dfrac{1}{8}\\ =8\times\dfrac{1}{3}-\dfrac{1}{8}=\dfrac{8}{3}-\dfrac{1}{8}=\dfrac{61}{24}\\ ----\\ \dfrac{3}{5}:\dfrac{5}{6}:\dfrac{6}{7}:\dfrac{7}{8}+\dfrac{2}{5}+\dfrac{23}{35}\\ =\dfrac{3}{5}\times\dfrac{6}{5}\times\dfrac{7}{6}\times\dfrac{8}{7}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{18}{25}\times\dfrac{4}{3}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{353}{175}\)

`@` `\text {Ans}`

`\downarrow`

`2023 \times 14 + 2023 \times 83+97`

`= 2023 \times (14+83) + 97`

`= 2023 \times 97 + 97`

`= 196231 +97`

`= 196328`

`78 \times 31+78 \times 24+78 \times 17+78 \times 22 \times 72`

`= 78 \times (31+24+17+22 \times 72)`

`= 78 \times (31+24+17+1584)`

`= 78 \times 1656`

`= 129168`

`371 \times 69+371 \times 14+629 \times 83`

`= 371 \times (69+14) + 629 \times 83`

`= 371 \times 83 + 629 \times 83`

`= 83 \times (371+629)`

`= 83 \times 1000`

`= 83000`

`91 \times 51+49 \times 163-49 \times 72`

`= 91 \times 51 + 49 \times (163-72)`

`= 91 \times 51+49 \times 91`

`= 91 \times (51+49)`

`= 91 \times 100`

`= 9100`

`3 \times 12 \times 17 + 4 \times 9 \times 81 + 2 \times 6 \times 6`

`= 9 \times 4 \times 17 + 4 \times 9 \times 81 + 4 \times 9 \times 2`

`= 9 \times 4 \times (17+81+2)`

`= 36 \times 100` 

`= 3600`

`42 \times 17 + 58 \times 83 \times 42 \times 83 + 42 \times 83 + 17`

`= 17 \times (42+58) + 42 \times 83 \times (58 \times 83 +1)`

`= 17 \times 100 + 3486 \times 4815`

`= 1700 + 16785090`

`= 16786790`

\(\dfrac{1}{2}\) xy=\(\dfrac{17}{42}\)

=\(\dfrac{17}{42}\):\(\dfrac{1}{2}\)

= \(\dfrac{34}{42}\)

= 649 * ( 94 - 83 )

= 649 * 11

= 7139

Bằng 6490 nha bạn

Chúc bạn hok tốt

T.I.C.K cHO MÌNH NHA

= 649 x (94 - 83 - 1)
= 649 x 10
= 649
học tốt nha bạn

649 x 94 -83 x 649 - 649

=649 x 94 - 83 x 649 - 649 x 1

=649 x (94 - 83 - 1)

=649 x 10

=6490

bằng 6490 nha bạn

Chúc bạn hok tốt

T.I.C.K cho mình nah

( 18 x 83 + 9 x 17 x 2 - 3 x 60 x 6 ) : 72 = ( 18 x 83 + 18 x 17 - 18 x 60 ) : 72

                                                               = [ 18 x ( 83 + 17 - 60 ) ] : 72

                                                               = ( 18 x 40 ) : 72

                                                               = 720 : 72

                                                               = 10

(18.83+9.2.17-3.6.60):72

=(18.83+18.17-18.60):72

=18.(83+17-60):72

=18.40:72

=720:72

=10

Hướng dẫn giải:

a.

17 x 543 + 83 x 543

= (17 + 83) x 543

= 100 x 543

= 54300

b.

318 x 963 + 682 x 963

= (318 + 682) x 963

= 1000 x 963

= 963000

a)17x543+83x543

=(17+83)x543

=100x543

=54300

b)318x963+682x963

=(318+682)x963

=1000x963

=963000

C1 : = 630 : 6 = 105

C2 : = 936 : 6 - 306 : 6 = 156 - 51 = 105