吉林省白城市通榆县七年级数学上册1.4有理数的乘除法1.4.1有理数的乘法导学案3(无答案)(新版)新人教版.doc

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1有理数的乘 法(3) 授课时间:_ _ 姓名:_ 七年_班【学习目标】:1、熟练有理数的乘法运算并能用乘法运算律简化运算;2、学生通过观察、思考、探究、讨论,主动地进行学习;【学习重点】:正确运用运算律,使运算简化【学习难点】:运用运算律,使运算简化预习案1、小学时学过的乘法运算律有哪些?这些运算律有什么用途?一、知识链接1、请同学们计算并比较它们的结果:(1) (6)5= 5(6)=(2) 3(4)(5)= 3(4)(5)=(3) (-2+3)6= (-2)6+36 =检测案1、 (85)(25)(4) ; 2、 ( 87)15(1 7) ;3、 ( 1509)30; 4、 (7)( 43) 51 ; 25、 9 1818; 6、 (9)(11)+12(9) ;

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