Question

tính nhanh :

20,21 x 35,75 + 20,21 x 62,25 + 40,42

 

Answer 1

\(20,21\times35,75+20,21\times62,25+40,42\\ =20,21\times35,75+20,21\times62,25+20,21\times2\\ =20,21\times\left(35,75+62,25+2\right)\\ =20,21\times100\\ =2021\)

Answer 2

\(20,21\times35,75+20,21\times62,25+40,42\)

\(=20,21\times\left(35,75+62,25\right)+20,21\times2\)

\(=20,21\times\left(98+2\right)\)

\(=20,21\times100=2021\)

Answer 3

`20,21 xx 35,75 + 20,21 xx 62,25 + 40,42`

`= 20,21 xx 35,75 + 20,21xx62,25+20,21xx2`

`=20,21xx(35,75+62,25+2)`

`=20,21xx100`

`=2021`

Answer 4

(20,21*98)+40,42=1021

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Answer 5

20,21 x 35,75 + 20,21 x 62,25 + 40,42

= 20,21 x 35,75 + 20,21 x 62,25 + 20,21 x 2

= 20,21 x (35,75 + 62,25 + 2)

= 20,21 x 100

= 2021

Answer 6

  Sai hết!