Срочно!10-12 минут.
Вычислите.
I. Заключение в скобки:
1. 37·12+37·88=
2. 18·9+18=
3. 101·17-17=
4. -48·25+28·25=
5. -63·59-41·63=
6. 39·138-137·39=
II. Раскрытие скобок:
1. 108-(108-5)=
2. -56+(-98+56)=
3. (79-81)-(39-81)=
4. (-39+15)-(5-39)=
5. -49-(-49+2)=
6. 100-(-5+100)=
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