四年级数学下册《小数简便计算》期中易错练习题!

四年级数学下册《小数简便计算》期中易错练习题!


简介:
43.21+98.76+56.79+1.24 =(43.21+56.79)+(98.76+1.24) =100+100 =200 6.3+15.4+0.09+3.7+14.6 =(6.3+3.7)+(14.6+15.4)+0.09 =40+0.09 =40.09 34.65-0.99-0.97 =34.65-1-1+(0.01+0.03) =32.65+0.04 =32.69 19.826-1.173-5.248-3.405 =19.826-(1.173+5.248+3.405 ) =19.826-9.826 =10