Multiplying and dividing by 2-digit numbers
Why this, why now
In this unit pupils will extend their understanding of formal calculation strategies to multiply and divide by 2-digit numbers, explaining when other strategies are more efficient.
Prior knowledge requirements
- Ardaydu waa inay yaqaanaan aasaaska maadada.
- Ardaydu waa inay awoodaan inay raacaan tilmaamo fudud.
Unit 10 / 21
Multiplying and dividing by 2-digit numbers
In this unit pupils will extend their understanding of formal calculation strategies to multiply and divide by 2-digit numbers, explaining when other strategies are more efficient.
15 lessons- Use long division with decimal remainders
- Solve problems involving remainders in context
- Use long division with fraction remainders
- Using short and long division to divide by a 2-digit divisor
- Explain how to use long multiplication to multiply two 2-digit numbers with regrouping
- Dividing by a 2-digit divisor including using long division
- Dividing by a 2-digit divisor with a remainder
- Explain how to multiply a 3-digit number by a 2-digit number
- Explain how to use long multiplication to multiply two 2-digit numbers regrouping ones to tens
- Explain how to use the associative law to multiply efficiently
- Explain how to use long multiplication to multiply a 3-digit by a 2-digit number
- Solve problems with 4-digit dividends using factors and long division
- Explain how to use long multiplication to multiply a 4-digit by a 2-digit number
- Dividing numbers with up to 4 digits by multiples of 10
- Explain when it is efficient to use factorising or long multiplication to multiply by 2-digits