问题
解答题
口算.
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答案
40×60=2400, | 100×5=500, | 480÷6=80, | 648÷2=324, |
23×30=690, | 0×451=0, | 0÷47=0, | 4.9-4.5=0.4, |
603÷3=201, | 0.6+2.4=3, | 30×50=1500, | 2-1.6=0.4, |
口算.
|
40×60=2400, | 100×5=500, | 480÷6=80, | 648÷2=324, |
23×30=690, | 0×451=0, | 0÷47=0, | 4.9-4.5=0.4, |
603÷3=201, | 0.6+2.4=3, | 30×50=1500, | 2-1.6=0.4, |