问题 解答题

连一连.

9+x=45 x=0

x-20=46 x=66

x一16=23 x=39

x+26=26 x=36.

答案

9+x=45,

9+x-9=45-9,

x=36,

x-20=46,

x-20+20=46+20,

x=66;

x-16=23,

x-16+16=23+16,

x=39;

x+26=26,

x+26-26=26-26,

x=0,

连线如下:

9+x=45________x=36

x-20=46_____x=66

x-16=23______x=39

x+26=26_______x=0

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