简便计算49×99+48

Question

如题所述

Answer 1

49×99+48=49*99+49-1=49*(99+1)-1=4900-1=4899.
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Answer 2

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Answer 3

49×99+48
=49×（100-1）+48
=49×100-49×1+48
=4900-49+48
=4899

Answer 4

(48+1)×99+48
=4899
(48×99+99+48)
=4899
48×(99+1)+99
=4899

Answer 5

原式＝49x99+49-1=49x100-1=4900-1=4899