问题
解答题
口算.
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答案
55+37=92, | 13×3=39, | 5700-5000=700, | 400×7=2800, |
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80-26=54, | 69÷3=23, | 4000+3000=7000, | 300×2×3=1800, |
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口算.
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55+37=92, | 13×3=39, | 5700-5000=700, | 400×7=2800, |
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80-26=54, | 69÷3=23, | 4000+3000=7000, | 300×2×3=1800, |
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