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3.56×3+7×3.56可以用________律进行简算,0.25×9.5×8可以用________律进行简算.

乘法分配    乘法交换律与结合
分析:乘法分配律:两个数相加(或相减)再乘另一个数,等于把这个数分别同两个加数或减数相乘,再把两个积相加或相减,得数不变.用字母表示:(a+b)c=ac+bc;
乘法结合律:三个数相乘,先把前两个数相乘,再同第三个数相乘;或先把后两个数相乘,再同第一个数相乘积不变.用字母表示:(ab)c=a(bc ).
乘法交换律:两数相乘,交换两数的位置,积不变,ab=ba.
解答:3.56×3+7×3.56,
=3.56×(3+7),
=3.56×10,
=35.6;
运用了乘法分配律.
0.25×9.5×8,
=0.25×8×9.5,
=2×9.5,
=19;
运用了乘法交换律与结合律.
故答案为:乘法分配,乘法交换律与结合.
点评:此题考查了运算定律与简便运算.
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