问题
口算题
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= |
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答案
(1)0.8
(2)0.4 | (3)100 | (4)0.6 (5)1.5 | (6)410 | (7)5 | (8)2 (9)3 | (10)19 | (11)660 | (12)0 (13)560 | (14)230 | (15)3200 | (16)240 (17)0 | (18)140 | (19)160 | (20)3600 (21)1200 | (22)0.3 | (23)6.4 | (24)130 (25)0 | (26)60 | (27)24 | (28)40
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