⑴1.9+0.05= ⑷7x﹣x= ⑺[2,15]= ⑽>( )
⑵5.8×2= ⑸6a+15a= ⑻[5,35]= ⑾>( )
⑶1.21÷1.1= ⑹(18,20)= ⑼[9,12]= ⑿<( )
⑴ ⑵ ⑶ ⑷
(小贴士数字的大写:零壹贰叁肆伍陆柒捌玖)