口算．+= 0.5×0.6÷0.5×0.6= 82= 0.9+0.01=4.5﹣2.8﹣0.7= ÷0.75= 1+6÷7= 2÷=
用简便方法计算．7.2×0.5+0.5×2.8 3.57×0.125×8 2.8×101 3.5×98．
简便计算：125×25×32 37×29+37 76×101136×42﹣42×36 72×36+36×28．
360÷45．
简便计算．83+83×99 87×46﹣46×77 38×102．
简便计算．135+39+65+11 96×27+27×4 3200÷25÷4 56×301﹣56．
+
= 0.5×0.6÷0.5×0.6= 82= 0.9+0.01=
÷0.75= 1+6÷7= 2÷
=
粤公网安备 44130202000953号