小升初数学必考重点易错题型:简便计算专项

小升初数学必考重点易错题型:简便计算专项


简介:
一、用简便方法计算。 ×4.4+1.2÷ 2.5×( +) = ×(4.4+1.2) =2.5×+2.5× = ×5.6 =1.5+0.6 = 3.2 =2.1 + ×15×17 × + × = ×15×17+×15×17 =×(+) =17+30 = =47