A=6*25*8+4*12*47+2*28*24 B=35*34+65*75+35*86+65*45 C=341*67+16*341+659*83 D=2*4*5*8*25*42*125 E=19991999*1998-19981998*1999

0 bình luận về “A=6*25*8+4*12*47+2*28*24 B=35*34+65*75+35*86+65*45 C=341*67+16*341+659*83 D=2*4*5*8*25*42*125 E=19991999*1998-19981998*1999”

1. Giải thích các bước giải:

   `A=6*25*8+4*12*47+2*28*24`

   `=48*25+48*47+48*28`

   `=48*(25+47+28)`

   `=48*100=4800`

   `B=35*34+65*75+35*86+65*45`

   `=(35*34+35*86)+(65*75+65*45)`

   `=35(34+86)+65(75+45)`

   `=35*120+65*120`

   `=120*(35+65)`

   `=120*100=12000`

   `C=341*67+16*341+659*83`

   `=341*(67+16)+659*83`

   `=341*83+659*83`

   `=83*(341+659)`

   `=83*1000=83000`

   `D=2*4*5*8*25*42*125`

   `=(2*5)*(4*25)*(8*125)*42`

   `=10*100*1000*42`

   `=42000000`

   `E=19991999*1998-19981998*1999`

   `=1999*10001*1998-19981998*1999`

   `=1999*(10001*1998-19981998)`

   `=1999*(19981998-19981998)`

   `=0`

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2. `A = 6. 25 . 8 + 4. 12. 47 + 2. 28 . 24`

   `A = (6. 8) . 25 + (4. 12) . 47 + (2. 24) . 28`

   `A = 48 . 25 + 48. 47 + 48 . 28`

   `A = 48 .(25 + 47 + 28)`

   `A = 48. 100`

   `A = 4800`

   ________________________

   `B = 35. 34 + 65. 75 + 35. 86 + 65. 45`

   `B = (35 . 34 + 35. 86) + (65. 75 + 65. 45)`

   `B = 35. (34 + 86) + 65. (75 + 45)`

   `B = 35 . 120 + 65. 120`

   `B = 120. (35 + 65)`

   `B = 12000`

   ________________________

   `C = 341 . 67 + 16. 341 + 659 . 83`

   `C = 341. (67 + 16) + 659. 83`

   `C = 341 . 83 + 659 . 83`

   `C = 83. (341 + 659)`

   `C = 83. 1000`

   `C = 83000`

   _________________________

   `D = 2. 4 . 5 . 8 . 25. 42. 125`

   `D = (2. 5). (4. 25). (8. 125) . 42`

   `D = 10. 100 . 1000 . 42`

   `D = 1000000. 42`

   `D = 42000000`

   _________________________

   `E = 19991999. 1998 – 19981998 . 1999`

   `E = (1999. 10001). 1998 – 19981998. 1999`

   `E = 1999. (10001. 1998) – 19981998. 1999`

   `E = 1999. 19981998 – 19981998 . 1999` 

   `E = 0`

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