计 算 (1)11-9= (2)12-4= (3)13-5= (4)11-7= (5)12-3= (6)13-4= (7)11-6= (8)14-5= (9)11-5= (10)11-8= (11)12-5= (12)11-2= (13)14-8= (14)13-6= (15)11-3= (16)12-6= (17)11-1= (18)11-4= (19)13-7= (20)14-7=
(思明区)印刷厂用一批纸装订英语练习本.如果每本36页,能订4000本,如果每本32页,能订多少本?
(思明区)120的比它的多多少?
(仙游县)应用上面的规律,直接写出下面试题的得数.=
(仙游县)先计算下面各题,然后找出规律. (1)= (2)= (3)=
(东山县)怎样简便就怎样计算. (1)3.5×0.8+5.5×80%+, (2)920÷40+23×50.