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