直接写出得数6÷= 19÷= ﹣= ×=0.37+1.6= 4.8÷0.8= 1+8%= 2.5÷1.25=0÷= ﹣=
80÷20= 87÷40= 72÷30=
判断，并改正．
在方框里填数．
列竖式计算． 168÷20= 356÷40= 428÷60= 317÷40=
= 19÷
= 
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