问题
解答题
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答案
20×34=680, | 3600÷40=90, | 25×8=200, | 5b-4b=b, | 32=9, |
18×400=7200, | 720÷30=24, | 560÷20=28, | a+a=2a, | 102=100. |
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20×34=680, | 3600÷40=90, | 25×8=200, | 5b-4b=b, | 32=9, |
18×400=7200, | 720÷30=24, | 560÷20=28, | a+a=2a, | 102=100. |