紧急!求下列算式的答案!是简便计算!99x47+47 84x99+84

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紧急!求下列算式的答案!是简便计算!99x47+47   84x99+84

紧急!求下列算式的答案!是简便计算!99x47+47 84x99+84
紧急!求下列算式的答案!是简便计算!
99x47+47 84x99+84

紧急!求下列算式的答案!是简便计算!99x47+47 84x99+84
=47x(99+1)
=47x100
=4700
=84x(99+1)
=84x100
=8400

99x47+47 84x99+84
=99x47+47x1 =84x99+84x1
=(99+1)x47 =(99+1)x84
=100x47 =100x84
=4700x =8400
望采纳 O(∩_∩)O谢谢

=99×47+1×47 =84×99+84×1
=(99+1)×47 =84×(99+1)
=100×47 =84×100
=4700 8400