问题 解答题 口算:32+22=2.25+34=47÷4=8-45=0.21×34+0.21÷4=21÷4=1÷(110÷18)=15÷5×25=59+15-59=1-1113-213= 答案 32+22=132.25+34=347÷4=178-45=7150.21×34+0.21÷4=0.2121÷4=5.251÷(110÷18)=5415÷5×25=159+15-59=151-1113-213=0.