Understanding Additions and Subtractions with Number Lines

The video tutorial explains how to perform calculations involving addition and subtraction of positive and negative numbers using a number line. It provides step-by-step examples, demonstrating how to handle different operations and signs, and emphasizes breaking down complex calculations into manageable steps.

What tool is introduced to help with solving calculations involving additions and subtractions?

• Graph paper

• Number line

• Calculator

• Abacus

When starting a calculation at negative six, what is the first step?

• Add positive four

• Place your finger on negative six

• Move to the left

• Move to the right

How do you move on the number line when adding a positive number?

• Move to the left

• Move diagonally

• Stay in place

• Move to the right

What happens on the number line when you subtract a negative number?

• Move to the left

• Move to the right

• Stay in place

• Move upwards

When adding a negative number, which direction do you move on the number line?

• Stay in place

• Move upwards

• Move to the right

• Move to the left

In the new calculation starting with 81, what is the first operation performed?

• Subtract positive seven

• Add negative three

• Add positive eleven

• Subtract negative four

What is the result of subtracting a positive number on the number line?

• Move to the right

• Move to the left

• Stay in place

• Move upwards

How do you move on the number line when adding a negative number in the final steps?

• Stay in place

• Move to the left

• Move upwards

• Move to the right

What is the final answer of the calculation starting with 81?

• 90

• 75

• 81

• 86

What is the key to solving complex additions and subtractions according to the video?

• Guessing the answer

• Memorizing formulas

• Using a calculator

• Breaking it down into steps