请仔细算，直接写得数．
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(1)20 ×21= |
(2)40 ×12= |
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(3)30 ×23= |
请仔细算，直接写得数．
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(1)14 ×10= |
(2)11 ×70= |
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(3)32 ×20= |
口算．
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(1)8 ×200= |
(2)900 ×5= |
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(3)700 ×1= |
(4)410 ×2= |
口算．
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(1)40 ×5= |
(2)11 ×30= |
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(3)23 ×20= |
(4)40 ×70= |
口算．
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(1)13 ×20= |
(2)39 ×10= |
(3)90 ×60= |
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(4)60 ×25= |
(5)20 ×65= |
(6)70 ×12= |
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(7)50 ×80= |
(8)16 ×50= |
口算．
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(1)2 ×7+6= |
(2)4 ×8＋8= |
(3)9 ×8＋12= |
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(4)4 ×6＋20 |
(5)12 ×5＋10= |
(6)8 ×8＋46= |
口算．
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(1)13 ×3= |
(2)34 ×2= |
(3)24 ×3= |
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(4)8 ×30= |
(5)16 ×20= |
(6)12 ×8= |
口算．
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(1)270 ×2= |
(2)40 ×6= |
(3)44 ×20= |
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41 ×3= |
32 ×20= |
10 ×23= |
|
33 ×3= |
24 ×40= |
3 ×31= |
|
18 ×20= |
15 ×50= |
9 ×10= |
口算．
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(1)16 ×2= |
(2)120 ×3= |
(3)200 ×4= |
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(4)18 ×5= |
(5)160 ×5= |
(6)300 ×3= |
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(7)20 ×6= |
(8)150 ×7= |
(9)270 ×2= |