数一数下图中总共有多少个角?
直接写得数.×= ÷2= ×= 68÷10%=×72% ×÷= ﹣+= 1﹣﹣=80%﹣20%= 4×25%+16×25%= ×÷×= (+)×12=
= = = == 0×1.27= = == = = 1.5÷25%+1.5=
口算:× 45× ÷10 0÷ 54×÷ ×64 12÷ (﹣)×24 3×÷3×.
直接写出得数×= 1﹣= ÷1= ÷=×= 2.5×= ×= 52×=×÷×= 0÷5×=
直接写得数.= 24÷= = == ﹣= = ﹣×=