수와 연산 전체 문제

Checking Account Patty has a balance of $-\char36 23$ in her checking account. She deposits $\char36 80$ to the account. What is the new balance?

Explain why the difference of $9$ and $-6$ is $15.$

Why is the result of subtracting $3-(-4)$ the same as the result of adding $3+4?$

Translate the quotient of $20$ and $13$ into an algebraic expression.

Add: $-5+(-5)+(-5).$

$\text{Evaluate}\,n+4\,\text{when}\,n=-7.$

Multiply each of the following:

• ⓐ $\,-9\cdot 3\quad$
• ⓑ $\,-2(-5)\quad$
• ⓒ $\,4(-8)\quad$
• ⓓ $\,7\cdot 6$

Multiply:

• ⓐ $\,-6\cdot 8\quad$
• ⓑ $\,-4(-7)\quad$
• ⓒ $\,9(-7)\quad$
• ⓓ $\,5\cdot 12$

Multiply:

• ⓐ $\,-8\cdot 7\quad$
• ⓑ $\,-6(-9)\quad$
• ⓒ $\,7(-4)\quad$
• ⓓ $\,3\cdot 13$

Multiply each of the following:

• ⓐ $\,-1\cdot 7\quad$
• ⓑ $\,-1(-11)$

Multiply.

• ⓐ $\,-1\cdot 9\quad$
• ⓑ $\,-1\cdot (-17)$

Multiply.

• ⓐ $\,-1\cdot 8\quad$
• ⓑ $\,-1\cdot (-16)$

Divide each of the following:

• ⓐ $\,-27\div 3\quad$
• ⓑ $\,-100\div (-4)$

Divide:

• ⓐ $\,-42\div 6\quad$
• ⓑ $\,-117\div (-3)$

Divide:

• ⓐ $\,-63\div 7\quad$
• ⓑ $\,-115\div (-5)$

Divide each of the following:

• ⓐ $\,16\div (-1)\quad$
• ⓑ $\,-20\div (-1)$

Divide:

• ⓐ $\,6\div (-1)\quad$
• ⓑ $\,-36\div (-1)$

Divide:

• ⓐ $\,28\div (-1)\quad$
• ⓑ $\,-52\div (-1)$

$\text{Simplify:}\,7(-2)+4(-7)-6.$

Simplify:

$8(-3)+5(-7)-4$