如题所述
56x199+56
=56x(199+1)
=56x200
=11200
=56x(199+1)
=56x200
=11200
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第1个回答 2022-12-12
乘法分配律为:两个数的和与一个数相乘,先将它们与这个数分别相乘,再相加,积不变.即:(a+b)×c=a×c+b×c.反过来则:a×c+b×c=(a+b)×c
56× 199 +56
=56 ×(199+1)
= 56×200
= 11200
56× 199 +56
=56 ×(199+1)
= 56×200
= 11200
第2个回答 2016-12-05
=56x(199+1)
=56x200
=11200
=56x200
=11200
第3个回答 2016-12-05
=56×(199+1)
=56×200
=11200
=56×200
=11200