用竖式计算.(打☆的要验算)☆249÷18 560÷35 ☆272÷89☆490÷68 504÷64 532÷50.
直接写出得数.×= ﹣= 0÷=5÷= 70×=
计算0.62= ×= 4×60%= 0×=÷2= 10÷= ×3.6= 0.875÷0.125=
找准对应.(12)
×15= ÷= ÷50%= 8×25%=×0×= ﹣= 0.5+= ×=÷3= (﹣)×30=
16÷0.25= = = == = 1﹣= 2.25+×== = = =