Tính nhanh: a,4×125258 b,2×8×50×25×125 c,1782×99+1782

2 bình luận về “Tính nhanh: a,4×125258 b,2×8×50×25×125 c,1782×99+1782”

1. a,4xx125258 = 501032

   b,2×8×50×25×125

   =(2xx50)xx(8xx125)xx25

   =100 xx 1000 xx25 = 100000 xx 25 = 2500000

   c,1782x×99+1782

   =1782 xx 99 + 1782 xx1

   =1782 xx (99+1)

   = 1782xx100=178200

    $#Hitturo$

   Trả lời
2. a)4×125258

   =501032

   $\\$

   b)2×8×50×25×125

   =16×50×25×125

   =800×25×125

   =20000×125

   =2 500 000

   $\\$

   c)1782×99+1282

   =176418+1782

   =178200

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