First Grade Adding 5's and 4's

First Grade Adding 5's and 4's

Using Number Lines

• Definition: A number line is a visual representation of numbers in a straight line, allowing easy addition and subtraction.
• Adding 5's:
  • Start at the first number.
  • Jump forward 5 spaces for each addition:
    • Example: From 3, jump to 8 (3 + 5 = 8).
• Adding 4's:
  • Start at the first number.
  • Jump forward 4 spaces for each addition:
    • Example: From 6, jump to 10 (6 + 4 = 10).
• Visualization: Encourage students to draw their own number lines to see the jumps clearly.

Word Problems With Addition

• Understanding Word Problems: Teach students to identify key information and determine what is being asked.
• Structure of Word Problems:
  • Identify the starting number.
  • Determine how many to add (either 4 or 5).
  • Calculate the total.
• Examples:
  • 5's Word Problem: "If I have 7 apples and I buy 5 more, how many apples do I have now?" (7 + 5 = 12).
  • 4's Word Problem: "There are 10 birds in a tree. 4 more birds come to the tree. How many birds are there now?" (10 + 4 = 14).
• Key Strategies:
  • Use drawings to visualize the problem.
  • Encourage students to write out the equation.
  • Practice with various scenarios to reinforce skills.

Using Number Lines

• A number line visually represents numbers in a straight line, facilitating addition and subtraction.
• Adding 5's involves starting at a given number and jumping forward 5 spaces for each addition.
• For example, starting from 3 and jumping 5 spaces results in 3 + 5 = 8.
• Adding 4's follows a similar approach, beginning at a chosen number and making 4-space jumps.
• For instance, starting from 6 and jumping 4 spaces gives 6 + 4 = 10.
• Visual aids like drawing personal number lines can help students understand the jumps more effectively.

Word Problems With Addition

• Understanding word problems entails recognizing key information and clarifying the question being asked.
• The structure of word problems includes identifying the initial number, the amount to add (4 or 5), and then calculating the total.
• An example of a 5's word problem: "If I have 7 apples and buy 5 more, how many apples do I have?" (7 + 5 = 12).
• An example of a 4's word problem: "There are 10 birds in a tree. 4 more come to the tree. How many birds are there now?" (10 + 4 = 14).
• Key strategies for solving word problems include using drawings for visualization and writing out the equations explicitly.
• Practicing various scenarios reinforces addition skills and enhances problem-solving abilities.