四年级下册数学 小数加减法——寒假练习

四年级下册数学 小数加减法——寒假练习


简介:
4.37+15.14-0.14 =4.37+(15.14-0.14) =4.37+15 =19.37 (15.28+28.99)+20.72 =15.28+20.72+28.99 =36+28.99 =64.99 5.85-1.75-0.25 =5.85+(1.75+0.25) =5.85-2 =3.85 3.7+2.8+7.3+17.2 =(3.7+7.3)+(2.8+17.2) =11+20 =31