Question

to perform addition and subtraction of integers using different coloured buttons counters ??? pls answer​

Answer 1

Answer:

Objectives:

Add integers

Subtract integers

Apply addition and subtraction of integers to a problem-solving project.

This lesson is designed for Sixth and Seventh Graders

Addition of Integers

When integers have the same sign, add the integers. The sum will have the same sign as the integers.

+ 7 + +8 = +15 -9 + -4 = -13

When integers have different signs, find the difference between the two numbers. The sum will have the sign of the integer with the largest absolute value.

+8 + -5 = +3 +4 + -9 = -5

Why? Think of the integers as either negative or positive charges. A positive and negative will bond and create a zero pair (additive inverse).

Consider the problem +3 + (- 5).

Blue counters represent positive integers. Red counters represent negative integers

Step 1: Start with three positive counters.

Step 2: Five negative counters are added to the three positive counters.

Step 3: The three negative counters combine with three of the positive counters to create zero pairs. There value is zero. There are two negative counters left. Therefore, + 3 + (-5) = -2