BBC1 年
Multiplication up to 4-digits by 2-digits
In long multiplication we break the sum down into ... To multiply a number by 40, we will multiply by 10 and then by 4. Placing the zero in the ones column is the multiplying by 10 bit!
BBC6 个月
Multiplication up to 4-digits by 2-digits
In long multiplication we break the sum down into ... To multiply a number by 40, we will multiply by 10 and then by 4. Placing the zero in the ones column is the multiplying by 10 bit!