=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

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tôi                              ko                         biết

Ta tính phép tính \(23\cdot5^2\) trước

Vì trong biểu thức có chứa lũy thừa nên em phải tính lũy thừa trước:

23.5^2 + 39 : 3 + 1

= 23.25 + 13 + 1

= 575 + 13+ 1

= 588 + 1

= 589

\(\frac{825\cdot632-189}{825\cdot631+636}\)

\(=\frac{825\cdot631+825-189}{825\cdot631+636}\)

\(=\frac{825\cdot631+636}{825\cdot631+636}\)

=1

\(\frac{825\cdot632-189}{825\cdot631+636}\)

\(=\frac{825\cdot631+825-189}{825\cdot631+636}\)

= \(\frac{852.613+\left(852-189\right)}{852.613+663}\)

\(=\frac{825\cdot631+636}{825\cdot631+636}\)

= 1

2x18x14+3x12x17+4x31x9

=36x14+36x17+36x31

=36x(14+17+31)

=36x62

=2232

2x18x14+3x12x17+4x31x9

=36x14+36x17+36x31

=36x(14+17+31)

=36x62=2232.

 Tính nhanh:    123,45 + 23,56 + 76,44 + 54,55

= (123,45 + 54,55) + (23,56 + 76,44)

= 178 + 100

=278

      123,45 + 23,56 + 76,44 + 54,55   =
                                            (123,45 + 54,55) + (23,56 + 76,44)  =
                                                    178           +          100                 =  278
 

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

(51.39 + 51.18) : 57
= 51.(39+18) :57
= 51.57 :57

=51.1

=51

(51.39 + 51.18) : 57

= 51.(39+18) :57

= 51.57 :57

=51. (57 : 57)

=51.1

= 51