1.Выполните действия 1) -1 3/11*(-2 2/21)=
2. Упростите выражение:

1) -1,5а ∙ (-6b); 3) b+(7 –b) – (14 – b);

2) –4m –15n+3m+18n; 4) –2(x –3)+4(x+1).

3. Найдите значение выражения:

(-1,14 – 0,96) : (–4,2) + 1,8 ∙ ( –0,3).
ДАМ 30 БАЛОВ!!!
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