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̫ƽ·Сѧ¿α˽̰Сѧ꼶ѧ²ᡶ12PPTμ

ʱ䣺2014-02-11 10:59:55  

1 2

72ˣ 44 ȥ ȥ 85˵ ж ˣ

ʽأ

ü㡣

üӷ㡣

72ˣ 44 ȥ 85˵ ж ˣ

72-44=28 28+85=113

72-44+85=113

113ڻ

ϰ:
300+74-86

420-45+27

ûŵʽ ֻмӷ㣬Ҫ Ұ˳㡣

ѩء3Ӵ987ˡ 㣬6ԤƽӴˣ

ѩء3Ӵ987ˡ 㣬6ԤƽӴˣ 987

3죺 6죺


ʽ98736

ʽ98736 98736 = 3296

= 1974()

ѩء3Ӵ987ˡ 㣬6ԤƽӴˣ
987

3죺

6죺


ʽ63987

ʽ63987 63987 = 2987

= 1974()

72-44+85=113
98736 = 3296 = 1974() 63987 = 2987 = 1974()

ûŵʽ ֻмӡֻг˳ ҪҰ˳㡣

ϰ:

700359 360418

ûŵʽֻг˳ ҪҰ˳㡣



ϰ:
1 )

496= 6485= 174+2055=

24+33-11= 49-24+5=

5679= 43-8+20=

451+804612=

һͧÿʻ640ףǷٶ (2)
415ʻף

640415 =16015 =2400()

(3)

100+45-65 = 145 -65 = 80

120-84+16 = 36 +16 = 52

150254
= 6 4 = 24

239015 = 780 15 = 52

С:
ûŵʽֻ мӡֻг˳Ҫ Ұ˳㡣

ɫСѧ


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