5．用简便方法计算下面各题．
| 1.9+1.29+0.71+2.1 | 376-76-24 | 101×76 |
| 25×88×4 | 23×62+38×23 | 3000÷8÷125． |
4．直接写得数
0 165030 165038 165044 165048 165054 165056 165060 165066 165068 165074 165080 165084 165086 165090 165096 165098 165104 165108 165110 165114 165116 165120 165122 165124 165125 165126 165128 165129 165130 165132 165134 165138 165140 165144 165146 165150 165156 165158 165164 165168 165170 165174 165180 165186 165188 165194 165198 165200 165206 165210 165216 165224 199269
| 0.6+2.5= | 5.3-4.7= | 12×5= | 11.8+2= |
| 125×8= | 0.19+0.35= | 16×4= | 0.99-0.26= |
| 7.6+1.8= | 9-2.4= |
