6 1/12-4 2/3=73/12-14/3=73/12-56/12=17/12=1 5/12
1-2
2-5
3-5
4-5
5-5
6-5
7-3
8-4
9-9
10-4
85+48:(11-x)=91
48:(11-x)=91-85
11-x=6*48
11-x=288
x=288+11
X=299
1.6936:3=2312
2.9648:8=1206
3.672*308=206976
4.2312-1206=1106
5.1106+206976=208082
1.307*209=64163
2.14580:5=2916
3.64163-2916=61247
4.61247+1345=62592
№450
а) 704+704+704+704=2816
704+704=1408
704+704=1408
1408+1408=2816