题目

直接写出得数。 23+45=                 28-16=                  41-7= 12+31=                 40+21=                 80-6= 3×5=                     5×2=                   2×4= 32-7=                  17+18=                 80-20= 答案:23+45=68                 28-16=12                  41-7=34 12+31=43                 40+21=61                 80-6=74 3×5=15                   5×2=10                         2×4=8 32-7=25                  17+18=35                 80-20=60
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