Chapter 3.5, Problem 1P

1. Write an Add To problem that fits naturally with the equation
$(-4)+3=?$
Solve the problem, and explain why the solution makes sense.
2. Write a Take From problem that fits naturally with the equation
$(-4)-3=?$
Solve the problem, and explain why the solution makes sense.

To determine

An ‘ADD TO’ problem for the given equation.

Solution to the framed problem.

Answer to Problem 1P

The temperature in Delhi was $-4°\text{C}$ last week and now it has increased by $3°\text{C}$ . What is the temperature of Delhi now?

  $-4+3=-1$

Explanation of Solution

Given:

The given equation is:

  $\left(-4\right)+3=?$

Calculation:

An ADD TO problem can be framed as:

The temperature in Delhi was $-4°\text{C}$ last week and now it has increased by $3°\text{C}$ . What is the temperature of Delhi now?

The problem can be solved as

  $\begin{array}{l}\left(-4\right)+3=?\\ -4+3=-1\end{array}$

The diagram illustrating this can be drawn as

  

The temperature was 4 degrees below 0 degree. After the rise by 3 degrees, the temperature is -1 degree Celsius.

To determine

An ‘TAKE FROM’ problem for the given equation.

Solution to the framed problem.

Answer to Problem 1P

The temperature in Delhi was $-4°\text{C}$ last week and now it has fallen by $3°\text{C}$ . What is the temperature of Delhi now?

  $-4-3=-7$

Explanation of Solution

Given:

The given equation is:

  $\left(-4\right)-3=?$

Calculation:

A TAKE FROM problem can be framed as:

The temperature in Delhi was $-4°\text{C}$ last week and now it has fallen by $3°\text{C}$ . What is the temperature of Delhi now?

The problem can be solved as

  $\begin{array}{l}\left(-4\right)-3=?\\ -4-3=-7\end{array}$

The diagram illustrating this can be drawn as

  

The temperature was 4 degrees below 0 degree. After the fall by 3 degrees, the temperature is -7 degree Celsius.