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Multiplying in your head

How to multiply in your head | Year 4 Mathematics

When we multiply a number by 10 mentally, we can easily shift each digit one place to the left and append a zero to the number.

Examples

Example 1: What is 6 x 40?
Sol:
 

  • 6 x 40 is equal to 6 x 4 x 10
  • 6 x 4 is equal to 6 x 2 x 2
  • 6 x 2 x 2 = 24
  • 24 x 10 = 240
  • This means 6 x 40 = 240

Feel free to simplify the calculation further based on what you already know. If you are aware that 6 x 4 equals 24, you can skip breaking it down into 6 x 2 x 2.

Example 2: What is 0.2 x 10 ?
Sol: 

How to multiply in your head | Year 4 Mathematics

We move each number a place value to the left and add a zero at the end.
0.2 x 10 = 2

The document How to multiply in your head | Year 4 Mathematics is a part of the Year 4 Course Year 4 Mathematics.
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FAQs on How to multiply in your head - Year 4 Mathematics

1. How can mental multiplication be taught effectively in UK schools?
Ans. Mental multiplication can be taught effectively in UK schools through strategies such as breaking numbers down, using known facts, and practicing regularly. Teachers can also incorporate real-life examples and interactive activities to make learning more engaging for students.
2. What are some common challenges students face when learning mental multiplication in UK schools?
Ans. Some common challenges students face when learning mental multiplication in UK schools include difficulty memorizing multiplication tables, struggling with larger numbers, and not understanding the concept of multiplication. Teachers can address these challenges by providing extra support and practicing various strategies.
3. How can parents support their children with mental multiplication practice at home in the UK?
Ans. Parents can support their children with mental multiplication practice at home in the UK by creating flashcards, playing math games, and encouraging their children to use mental math in everyday situations. It is important for parents to provide a positive and supportive learning environment for their children.
4. What are the benefits of learning mental multiplication in UK schools?
Ans. Learning mental multiplication in UK schools can improve students' problem-solving skills, increase their confidence in math, and enhance their overall mental math abilities. It also provides a strong foundation for more advanced math concepts and helps students become more efficient in their calculations.
5. How can teachers assess students' progress in mental multiplication in UK schools?
Ans. Teachers can assess students' progress in mental multiplication in UK schools through regular quizzes, timed drills, and observation of students' ability to solve multiplication problems mentally. Additionally, teachers can use informal assessments such as games and group activities to gauge students' understanding and progress.
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