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新北师大版数学七下1.4《整式的乘法》word教案1

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1.4 1



:

:


w w w .x k b 1.c o m
1 p14-15 2 3 1

2
1 x

31(a5)5 3(2a)2(3a 2)3

2 (a2b)3 4(y n)2 y n-1

wwW.x k B 1.c Om

1.

(1) 2x2y3xy2

(2) 4a2x5(-3a3bx)

=(

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)(

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=(

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(1) ----
----
[
(2) (3) 1

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(1) (-5a2b3)( -3a)

3

2

x3

y

2







3

xy

2

2

=_________

3

2

(2) (2x)3(- 5x2y) (4) (-3ab) (-a2c)26ab(c2)3



1. || | ||













2.

(1)(2xy2 ) (1 xy) 3

(2)(2a2b3) (3a)
xkb1.com

(3)(4 10)5 (5 104 )

(4)(3a2b2 ) (a3b2 )5

(5)( 2 a2bc3) ( 3 c5) (1 ab2c)

3

43

60.4x2y 1 xy2--2x3xy3 2

3 am=2,an=3,(a3m+n)2

4 5232n+12n-3n6n+2 13

5 a b m1 n2 (a 2n1 b) a5b3 m n

~~~///(^v^)\\\~~~

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