1)0,53х6,7=3,551
2)1,77х3,1=5,487
3)3,551+5,487=9,038
4)9,038+0,004=9,042
5)9,042:0,66=13,7
6)13,7-13,7=0
1)0,53х6,7=3,551
2)1,77х3,1=5,487
3)3,551+5,487=9,038
4)9,038+0,004=9,042
5)9,042:0,66=13,7
6)13,7-13,7=0