题目内容
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(1) 999 ×1=( ) |
(2) 1 ×9=( ) |
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999 ×2=( ) |
21 ×9=( ) |
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999 ×3=( ) |
321 ×9=( ) |
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999 ×4=( ) |
4321 ×9=( ) |
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(3) 999 ×5=( ) |
(4) 54321 ×9=( ) |
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999 ×7=( ) |
654321 ×9=( ) |
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999 ×9=( ) |
87654321 ×9=( ) |
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答案:999,1998,2997,3996;9,189,2889,38889;4995,6993,8991;488889,5888889,788888889
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