Information Technology (Computer Studies) – Primary 6 Weekly Short Class Lesson Notes for Second Term

WEEK 9 – SCRATCH PROGRAMMING FOR PERFORMING BASIC MATHEMATICS OPERATIONS

MEANING OF SCRATCH PROGRAMMING

Scratch is a block-based programming software that helps pupils solve problems, do calculations, draw, and create games by joining blocks together.

 

BASIC MATHEMATICS OPERATIONS

The basic mathematics operations are:

1. Addition (+)

2. Subtraction (−)

3. Multiplication (×)

4. Division (÷)

Scratch uses Operators blocks and Variables to perform these operations.

 

IMPORTANCE OF USING SCRATCH FOR MATHEMATICS

1. It makes mathematics fun and interesting.

2. It helps pupils understand calculations easily.

3. It improves logical thinking.

4. It encourages problem-solving skills.

 

BLOCKS USED FOR MATHEMATICS IN SCRATCH

1. Operators Blocks – ( + ) Addition, ( − ) Subtraction, ( × ) Multiplication, ( ÷ ) Division. Pick random – Greater than, Less than, Equal to

2. Variable Blocks – Used to store numbers. Examples: score, answer, number1, number2

3. Events Blocks – When green flag clicked – starts the program.

4. Looks Blocks – Say – displays the answer on the screen.

 

EXAMPLE – ADDITION IN SCRATCH

Steps:

1. Click When green flag clicked.

2. Create two variables: number1 and number2.

3. Set number1 = 5.

4. Set number2 = 3.

5. Use answer = number1 + number2.

6. Use Say answer.

 

OTHER MATHEMATICS OPERATIONS IN SCRATCH

Subtraction – Use number1 − number2.

Multiplication – Use number1 × number2.

Division – Use number1 ÷ number2.

 

EXAMPLES OF WHAT PUPILS CAN DO

1. Add two numbers

2. Subtract one number from another

3. Multiply numbers

4.  Divide numbers

 

SCRATCH PROGRAMMING FOR PERFORMING BASIC MATHEMATICS OPERATIONS

INSTRUCTION – Choose the correct answer from the options A – D.

1. Scratch is a ______ programming language.

A. text-based

B. block-based

C. machine

D. hardware

 

2. Which Scratch block is used to start a program?

A. When green flag clicked

B. Repeat

C. Say

D. Wait

 

3. Which blocks are mainly used for mathematics operations in Scratch?

A. Motion blocks

B. Looks blocks

C. Operators blocks

D. Sound blocks

 

4. Which of the following is NOT a basic mathematics operation?

A. Addition

B. Subtraction

C. Multiplication

D. Animation

 

5. The block used to store numbers in Scratch is called _______.

A. Events

B. Variables

C. Motion

D. Sound

 

6. Which operator is used for addition in Scratch?

A. ÷

B. ×

C. −

D. +

 

7. To show the answer on the screen, which block is used?

A. Move

B. Say

C. Turn

D. Pen down

 

8. Which Scratch block is used for multiplication?

A. +

B. −

C. ×

D. >

 

9. Division in Scratch uses the ______ symbol.

A. +

B. −

C. ×

D. ÷

 

10. Using Scratch for mathematics helps pupils to improve _______.

A. logical thinking

B. confusion

C. laziness

D. fear

ANSWER KEY –1. B 2. A 3. C 4. D 5. B 6. D 7. B 8. C 9. D 10. A