Objective

By the end of this lesson, you will be able to understand and apply basic arithmetic concepts in the context of engineering and electricity.

Materials and Prep

• Pencil and paper
• Calculator (optional)
• Basic understanding of addition, subtraction, multiplication, and division

Activities

• Activity 1: Engineering Math Puzzles

  Challenge yourself with some engineering-themed math puzzles. Solve the problems by using addition, subtraction, multiplication, or division. For example, if you have 5 resistors and each resistor has a resistance of 10 ohms, what is the total resistance when they are connected in series?

• Activity 2: Electrical Circuit Calculations

  Create a simple electrical circuit using batteries and light bulbs. Calculate the total voltage and current in the circuit. Use the formulas V = I * R and P = V * I to solve the problems. For instance, if the voltage of the battery is 4 volts and the resistance of the light bulb is 2 ohms, what is the current flowing through the circuit?

• Activity 3: Measurement and Conversion

  Measure the length, width, and height of different objects in your house. Calculate the volume and surface area of the objects using the appropriate formulas. For example, if you have a rectangular box with a length of 10 cm, width of 5 cm, and height of 3 cm, what is the volume of the box?

Talking Points

• "Arithmetic is a branch of mathematics that deals with numbers and basic operations like addition, subtraction, multiplication, and division."
• "Engineering is a field that involves designing and building structures, machines, and systems."
• "Electricity is a form of energy that powers many devices and systems we use every day."
• "In engineering, we often use arithmetic to solve problems and make calculations."
• "Addition is combining two or more numbers to find the total. For example, if you have 3 resistors with values of 5 ohms each, how much resistance do you have in total?"
• "Subtraction is taking away one number from another. For instance, if you have 10 volts of voltage and you connect a resistor that uses 3 volts, how much voltage is left?"
• "Multiplication is repeated addition. If you have 4 batteries, each with a voltage of 1.5 volts, what is the total voltage when you connect them in series?"
• "Division is splitting a number into equal parts. For example, if you have 20 volts in a circuit and you connect 4 light bulbs in parallel, how much voltage does each light bulb get?"