| 9.A 10.A 二、准确计算 1. 直接写出得数 0.04 1.05 1.12 5.94 0.1 1000 3 0.03 2.用竖式计算
3.计算下面各题，能简算的要简算。 0.75+0.25÷0.1
=0.75+2.5
=3.25
4.56×4.6+4.56×5.4
=4.56×(4.6+5.4)
=4.56×10
=45.6
46.28-(14.2+18.28)
=46.28-18.28-14.2
=28-14.2
=13.8
89.1—9.1÷(2.3-1.6)
=89.1-9.1÷0.7
=89.1-13
=76.1 |
