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STEM挑戰題005

September 25, 2017

 

STEM挑戰題005答案:

請見下圖,4個數式分別是:

a. 5+2+7+3=17 

b. 2+6+7+8=17

c. 1+4+3+9=17

d. 4+6+7=17

 

 

 

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