4.8kg4kg80g 3.153.150 4.95+6.8915.62-5.21
1.3×14= 0.13×0.14=
①43×34=
②432÷36=
③217÷3=
④120×23=
⑤3780÷84=
⑥65×240=
问题:
13.3+6.7= 12= = 49×101≈
21×50= 12.5×8= 0.72÷0.8= =