问题 解答题 直接写出得数72×421=1-34=109÷1=56÷512=79×928=2.5×45=35×59=52×413=12×13÷13×12=0÷5×25= 答案 72×421=231-34=14109÷1=10956÷512=279×928=142.5×45=235×59=1352×413=1612×13÷13×12=140÷5×25=0故答案为:23,14,109,2,14,2,13,16,14,0.