=48*25+48*41+48*34

=48*(25+41+34)

=48*100=4800

`@` `\text {Ans}`

`\downarrow`

`2.24.25 + 3.41.16 + 6.2.8.17`

`= 48*25 + 48*41 + 48*2*17`

`= 48*(25+41+2*17)`

`= 48*(66+34)`

`= 48*100 `

`= 4800`

 2.24.25 + 3.41.16 + 6.2.8.17

= ( 2.24 ).25 + ( 3.16 ).41 + ( 6.8 ) + ( 2.17 ) 

= 48 . 25 + 48 .41 + 48 . 34

= 48. ( 25 + 41 + 34 )

= 48 . 100

= 4800

giúp mình với, mình đang vội

\(2.24.25+3.41.16+6.2.8.17\\ =\left(2.24\right).25+\left(3.16\right).41+\left(6.8\right)\left(2.17\right)\\ =48.25+48.41+48.34\\ =48.\left(25+41+34\right)\\ =48.100\\ =4800\)

3.18.25 + 3.41.16 + 6.2.8.17

= 3.18.25 + 3.16.41 + (6.8).(2.17)

= 48.25 + 48.41 + 48.34

= 48.(25 + 41 + 34)

= 48.100

= 4800

3443432234. 3423434244

tôi                              ko                         biết

\(2.24.25+3.31.16+6.2.8.17\)

\(=48.25+48.31+48.34\)

\(=48.\left(25+31+24\right)\)

\(=48.90\)

\(=4320\)

=48*25+48*31+48*34

=48(25+31+34)

=48*90=4320

\(\text{2.24.25+3.31.16+6.2.8.17}\)

\(=\text{2.6.4.25+3.31.16+6.16.17}\)

\(=\text{12.100+16.3(31+2.17)}\)

\(=\text{1200+48(31+34)}=1200+48.65=1200+3120=4320\)

a) 86 + 357 + 14 = (86 + 14) + 357

= 100  + 357

= 457

b) 25 . 13 . 4 = (25 . 4) . 13

= 100 . 13

= 1300

c) 28 . 64 + 28 . 36  = 28 . (64 + 36)

= 28 . 100

=2800

a) 86 + 357 + 14

= ( 86 + 14 ) + 357

= 100 + 537

= 637

b)25 . 13 . 4

= ( 25 . 4 ) . 13

= 100 . 13

= 1300

c) 28 . ( 64 + 36 )

= 28 . 100

= 2800

  a (86+14)+357=100+357=457

b 25.13.4=(25.4).13=100.13=1300

c 28.64+28.36=28.(64+36)=28.100=2800

=(-259+259)+[(-74)+(-26)]+(-81+581)

=0+(-100)+500

=400

= -259 + 259 - 74 - 26 + 581 + 259 - 81
= 0 - 100 + 840 - 81
= 659

Mình bị nhầm :(( Tại bấm thêm số 259

\(1\frac{13}{15}.0,75-\left(\frac{104}{195}+25\%\right).\frac{24}{47}-3\frac{12}{13}:3\)

\(=\frac{28}{15}.\frac{3}{4}-\left(\frac{8}{15}+\frac{1}{4}\right).\frac{8}{9}-\frac{51}{13}.\frac{1}{3}\)

\(=\frac{7}{5}-\left(\frac{32}{60}+\frac{15}{60}\right).\frac{8}{9}-\frac{17}{13}\)

\(=\frac{7}{5}-\frac{47}{60}.\frac{8}{9}-\frac{17}{13}\)

\(=\frac{7}{5}-\frac{94}{135}-\frac{17}{13}\)

\(=\frac{-212}{351}\)

Tự quy đồng

\(2\frac{3}{4}.\left(-0,4\right)-1\frac{3}{5}.2,75+\left(-1,2\right):\frac{4}{11}\)

\(=\frac{11}{4}.\frac{-2}{5}-\frac{8}{5}.\frac{11}{4}-\frac{6}{5}.\frac{11}{4}\)

\(=\frac{11}{4}.\left(\frac{-2}{5}-\frac{8}{5}-\frac{6}{5}\right)\)

\(=\frac{11}{4}.\frac{-16}{5}\)

\(=\frac{-44}{5}=-8\frac{4}{5}\)