三升四暑假作业:小数加法和加减法简便计算,附答案

2.13+1.23+17.87=21.235.86+(6.57+8.14)=20.579.46+(0.54+2.71)=12.7112.04+(7.96+5.26)=25.266.26+(7.74+3.06)=17.064.32+0.26+12.68=17.261.4+(0.6+3.97)=5.973.42+0.95+0.05=4.420.21+3.89+9.11=13.2111.81+(9.33+2.19)=23.330.12+(6.12+1.88)=8.128.75+3.52+0.25=12.529.61+4.84+2.16=...