Помогите,пожалуйста!
Вычислите рациональным способом:
1) 2*6,7+8*7,6+8*2,4+2*3,3
2) 3*5,2+7*93+7*10,7+3*14,8
3) 12*2,3+17,7*11+17,7*9+8*2,3
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