Numbers



  2. Question:`12846 xx 593+12846 xx 407` 
    Answer
    `= 12846 xx (593+407)`

 `= 12846 xx 1000`

 `= 12846000`






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  3. Question:`987 xx 999` 
    Answer
    `=987 xx (1000-1)`
     ` =(987 xx 1000)-(987 xx 1)`
     ` =(987000-987)`
      ` =986013`






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  4. Question:`469157 xx 9999` 
    Answer
    =4691570000-469157
 =4691100843






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  5. Question:`935421 xx 625` 
    Answer
    `=935421 xx 25 xx 25`
`=935421 xx 100/4 xx 100/4 `
`=(9354210000)/16`
 =584638125






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  6. Question:Use the formula,`(a^2+b^2+2ab)=(a+b)^2`
`387 xx 387 xx +114 +2 xx 387 xx 114` 
    Answer
    `=(387)^2 + (114)^2 + 2 xx 387 xx 114`
`=(387 + 114)^2=(501)^2=(500 + 1)^2`
 `=(500)^2 + (1)^2 + 2 xx 500 xx 1`
`=250000 + 1 + 1000
  =251001






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