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4×96×5=96×(4×
5
5

(27×25)×12=27×(25×
12
12

(125×70)×8=(125×
8
8
)×70
(9×8)×(5×3)=(
9
9
×
3
3
)×(
5
5
×
8
8

(25×9)×(16×5)=(
25
25
×
16
16
)×(
9
9
×
5
5
分析:①④⑤运用乘法交换律与结合律;
②运用乘法结合律;
③运用乘法交换律.
解答:解:4×96×5=96×(4×5)
(27×25)×12=27×(25×12)
(125×70)×8=(125×8)×70
(9×8)×(5×3)=(9×3)×(5×8)
(25×9)×(16×5)=(25×6)×(9×5).
故答案为:5;12;8;9,3,5,8;25,16,9,5.
点评:此题主要考查学生对运算定律的掌握与运用情况.
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