Number Operations · B5 Mathematics

Lesson notes

Learning Objectives

Indicator: B5.1.2.4.1 - Divide 3-digit numbers by 1-digit number efficiently

By the end of the lesson, learners can:

Explain division as repeated subtraction of a 1-digit divisor from a 3-digit dividend.
Use the long division method to divide 3-digit numbers by 1-digit numbers without remainders.
Use the long division method to divide 3-digit numbers by 1-digit numbers with remainders.
Check division results using multiplication (quotient × divisor = dividend).
Solve word problems involving division of 3-digit numbers by 1-digit numbers in everyday situations.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Number Operations (1.2)
Content standard: B5.1.2.4 - Demonstrate an understanding of division of a 2 or 3- digit number by a 1 or 2-digit number
Indicator: B5.1.2.4.1 - Divide 3-digit numbers by 1-digit number efficiently
Suggested placement: Term 1, Week 10 (Week 10 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 4-6), 2019, p. 70
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Division as repeated subtraction (using the long division method). Explain division as a way of repeatedly subtracting a divisor number from a given dividend until there is none left and then determining the number of times the divisor is taken from the dividend

Wide colour mathematical teaching visual is organised as a table with horizontal divisions, vertical divisions,... — A wide colour mathematical teaching visual is organised as a table with horizontal divisions, vertical divisions, coloured regions. Visible labels, values, and notation include: 28; 9| 258; 18; 78; 72; 6; 25 goes into 9 two times; 9 × 2 = 18; 78 goes into 9 eight times; 9 × 8 = 72.