问题
解答题
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答案
25×4=100; | 300×8=2400; | 43×2=86; | 21×7=147; | 0×38=0; |
491×3≈1500; | 191×5≈1000; | 5×5=25; | 508×4≈2000; | 32×9≈270. |
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25×4=100; | 300×8=2400; | 43×2=86; | 21×7=147; | 0×38=0; |
491×3≈1500; | 191×5≈1000; | 5×5=25; | 508×4≈2000; | 32×9≈270. |