KS2 Primary Maths Age 9-13 - Multiplication with missing digits: - Explained

The video tutorial guides viewers through solving a multiplication problem where three numbers multiply to 385. The teacher begins by identifying 5 as a factor of 385 through division. The remaining number, 77, is then broken down into its factors, 7 and 11. The teacher discusses alternative solutions and emphasizes the importance of understanding factorization.

What is the first step in finding the factors of 385?

• Check if 385 is divisible by 11

• Check if 385 is divisible by 3

• Check if 385 is divisible by 7

• Check if 385 is divisible by 5

After finding that 385 is divisible by 5, what is the next step?

• Divide 385 by 3

• Divide 385 by 5

• Divide 385 by 11

• Divide 385 by 7

What are the two numbers that multiply to give 77?

• 5 and 15

• 6 and 13

• 7 and 11

• 8 and 9

Which factor pair was chosen to represent 77?

• 7 and 11

• 5 and 15

• 77 and 1

• 8 and 9

What is one alternative method mentioned for finding factors of 385?

• Using addition

• Using decimals

• Using fractions

• Using subtraction