口算。
(1)0.3+0.5= |
(2)1.2-0.8= |
(3)20×5= |
(4)2.0-1.4= |
(5)0.6+0.9= |
(6)820÷2= |
(7)5.7-0.7= |
(8)2.3-0.3= |
(9)1.9+1.1= |
(10)57÷3= |
(11)11×60= |
(12)0÷23= |
(13)80×7= |
(14)23×10= |
(15)40×80= |
(16)120×2= |
(17)0×38= |
(18)560÷4= |
(19)800÷5= |
(20)60×60= |
(21)24×50= |
(22)0.5-0.2= |
(23)5.9+0.5= |
(24)390÷3= |
(25)50-200÷4= |
(26)20×9÷3= |
(27)28÷7×6= |
(28)3×9+13= | |