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# 乘法的初步认识 - PowerPoint PPT Presentation

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## 乘法的初步认识

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60

90-30= 76+4= 55-50= 76+8=

80+20= 50+50= 100-70= 44-5=

41-1= 43+40= 50-23= 33+7=

80

5

84

30

100

100

39

83

40

40

27

4

3+3+3+3=12

3

4+4+4=12

)

5

2+2+2+2+2=10

2

5+5=10

3+3+3+3 5×2

4+4 3×4

2+2+2+2+2+2 3×3

3+3+3 4×2

1,3×4表示( )个( )相加,或( )个( )相加.

2.5+5+5改写成乘法算式是( )或( )

3.乘法的意义就是求几个( )加数和的简便运算

3

4