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直接写得数.30×50=15×8=0÷47=630÷7=306÷3=1-0.9=23×20=15×20=1.3+2.5=40×40=300×4=9.9-4.8=
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高二上学期数学《》真题及答案
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直接写得数.24×3=23×300=430×20=410×30=25×200=160×5=56×20
直接写得数.11×20=70×20=40×30=30×21=30×13=60×70=40×12=11
直接写得数.80×30=50×50=20×90=300×60=400×40=21×29≈61×37≈
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14+55×23=14×23+55 判断对错
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