六年级小升初数学计算题易错考点专练 题型一:简便计算。 例①:7.24×35+0.6×2.41﹣0.65×60% =7.24×0.6+0.6×2.41﹣0.65×0.6 =0.6×(7.24+2.41﹣0.65) =0.6×9 =5.4 例②:3.7×4.6+6.4×3.7﹣3.7 =3.7×4.6+6.4×3.7﹣3.7×1 =3.7×(4.6+6.4﹣1) =3.7×10 =37 例③:47×35+37÷53 =47×35+37×35 =35×(47+37) =35 例④:11×2+12×3+13×4+……149×50 =(1﹣12)+(12﹣13)+(13﹣14)+…(148﹣149)+(149﹣150) =1﹣12+12﹣13+13﹣14+…+148﹣149+149﹣150 =1﹣150 =4950
