人教版五年级数学上册口算天天练道

五年级上册口算每日练（1）4.7+2.3=4.5×2=6.9－2.5=7.2×0.8=6×3.4=0.62－0.32=1.4×0.5=0.75×100=0.02×0.5=3.6÷0.3=6.3÷7=5