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

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