列竖式计算.
21.6﹣14.8 28.3+44.8 40﹣26.7
47.9+54.5 31.2﹣22.4 63.5+76.5.
心算.
2.3+2.2= 5.62﹣2.02= 0.25+1.8=
9.5﹣1.3= 1.3﹣0.8= 3.5﹣0.5=
1.95÷3.05= 2.3+1.6= 5.31﹣2.01=
算一算,填一填.
0.9+0.6= 15.4+2.97= 5.94+10.7=
10﹣3.14= 10.2﹣8.75= 11.65﹣7.39=