99-1ц6/77+5ц5/11÷10/11÷9×1ц13/44-54ц2/7=99-83/77+60/11÷10/11÷9×57/44-380/7=
1)99-83/77=7623/77-83/77=7540/77
2)7540/77+60/11=7540/77+420/77=7960/77
3)7960/77÷10/11=796/7
4)796/7÷9=796/63
5)796/63×57/44=3781/231
6)3781/231-380/7=3781/231-12540/231=-37ц212/231