645× 100- 64500× 1+ 35670= ........ 13482: 1+(820× 45 - 36900)- 749×18=
1)645×100=64500 2)645×1=64500 3)64500-64500=0 4)0+35670=35670 13482÷1=13482 820×45=36900 36900-36900=0 749×18=13482 13482-13482=0