<span>4 11/14 - 3 2/7=67/14-23/7=67/14-46/14=21/14=3/2=1.5
3 13/44 - 1 7/33=145/44-40/33=435/132-160/132=275/132=2 1/12
9 11/60 - 3 13/80=551/60-253/80=2204/240-759/240=1445/240=6 1/48</span>
1)80 * 7-1*7=560-7=553
2)60*8-5*8=480-40=440
1)9,87-0,394-4,8=4,676
2)30-14,38-4,8=20,82
1. (в)
2. (в)
3. (а)
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