Problems from Combined operations

Development:

1)

• There is no operation in brackets, therefore we pass to the next step.
• There is no power, therefore we pass to the next step.
• There is only a multiplication and there is no division. It is: $3\cdot (-2)=-6$. So far, the expression is: $(-6)+(-6)$
• There is only one addition and there is no subtraction: $(-6)+(-6)=-12$ Therefore: $(-6)+3\cdot (-2)=-12$.

2)

• There is an operation in brackets: $(4+7)=11$ Therefore, we have: $11\cdot 2^2$
• There is a power: $2^2=4$. And so, we have: $11\cdot 4$
• We do the multiplication, the result: $11\cdot 4=44$ So: $(4+7)\cdot 2^2=44$

3)

• There is an operation in brackets: $(18+(-3))=15$ Therefore, it is: $15:5-(-2)$
• There is no power. Therefore, we pass to the next step.
• There is no multiplication, but there is a division. And it is: $15:5=3$ The expression is: $3-(-2)$
• There is only a subtraction: $3-(-2)=5$ Therefore: $(18+(-3)):5-(-2)=5$

Solution:

1. $(-6)+3\cdot (-2)=-12$
2. $(4+7)\cdot 2^2=44$
3. $(18+(-3)):5-(-2)=5$

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