口算我能行．
14×10= 13×30= 180÷3= 200÷5= 42×20= 20×50=
280÷2= 600÷6= 0×7= 0÷9= 43+28= 420÷6=
相关试题
直接写出得数．
0.83+0.27= 2.9×100= 50÷1000=
×10=0.7 80÷ =0.8 
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5.6+4= 0.13×1000= 
﹣0.35=
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