题目内容
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(1)20×7= |
|
(2)70×4= |
答案:140;280
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(1) |
20 ×3= |
11 ×3= |
4000 ×2= |
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230 ×3= |
101 ×5= |
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(2) |
700 ×3= |
1200 ×6= |
60 ×9= |
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4500 ×0= |
210 ×4= |
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(3) |
90 ×9= |
400 ×5= |
1000 ×7= |
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800 ×6= |
110 ×8= |
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(4) |
24 ×2= |
1700 ×5= |
900 ×3= |
口算.
|
(1)56 ÷7= |
28 ÷4= |
72 ÷8= |
27 ÷3= |
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(2)42 +9= |
54 ÷9= |
23 -7= |
45 +54= |
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(3)5 ×8= |
67 +8= |
9 ×9+8= |
45 ÷5= |
|
(4)57 -8= |
3 ×8= |
20 ÷5= |
18 ÷9= |