题目内容
14
×2=0.14
×2=14
×0.2=0.14
×0.2=
答案:28;0.28;2.8;0.028
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口算.
|
(1)6.4 +3.6= |
(2)0.9 -0.09= |
(3)1 -0.05= |
|
(4)0.3 +0.5= |
(5)5.7 -0.9= |
(6)7.3 +2.7= |
|
(7)0.3 +0.65= |
(8)3.5 -2.5= |
(9)1.75 +0.25= |
|
(10)4.63 +2.4= |
(11)4.7 -3= |
(12)3.6 -1.8= |
|
(13)0.06 +15= |
(14)2 -0.68= |
(15)0.28 +1.5= |
|
(16)10 -0.8= |
口算:
| 3.14×2= | 3.14×3= | 3.14×4= | 3.14×5= | 3.14×6= |
| 3.14×7= | 3.14×8= | 3.14×9= | 3.14×2.7= | |
| 4+ | 2- | 6÷ | ||
| | 3.14×2+3.14×0.7=________+________=________. | |||