如题所述
解:简便计算方法如下
56×99+99
=99×(56+1)
=99×57
=(100-1)×57
=100×57-1×57
=5700-57
=5643
56×99+99
=99×(56+1)
=99×57
=(100-1)×57
=100×57-1×57
=5700-57
=5643
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第1个回答 2020-07-27
=56×99+1×99
=(56+1)×99
=57×99
=57×(100-1)
=57×100-57
=5700-57
=5643
望采纳,谢谢
=(56+1)×99
=57×99
=57×(100-1)
=57×100-57
=5700-57
=5643
望采纳,谢谢
第2个回答 2020-07-27
56×99+99=56×99+56+43=56×(99+1)+43=5600+43=5643追答
56×99+99=56×99+56+43=56×(99+1)+43=5600+43=5643
56×99+99=56×99+56+43=56×(99+1)+43=56×100+43=5600+43=5643
第3个回答 2020-07-27
56×99+99
=(56+1)×99
=57×(100-1)
=57×100-57
=5643
=(56+1)×99
=57×(100-1)
=57×100-57
=5643
第4个回答 2020-07-27
56*99+99
=56*(99+1)
=56*100
=5600
=56*(99+1)
=56*100
=5600