The number partner: go figure

Learning Material  |  Interactive Lesson

This tutorial is suitable for use with a screen reader. Learn how to break up numbers into pairs of smaller numbers, eg 15 = 11 + 4. Work through examples of whole number pairs and sample questions. Apply these principles to solve additions or subtractions.
1. Students use a linear model to create number pairs of numbers between 10 and 30.
2. Students establish that larger numbers can be broken up into many pairs of smaller numbers.
3. Students investigate the commutative principle.
4. Students investigate the strategy of ‘counting on’ for addition and establish that it is preferable to count on from the larger number.

Curriculum Information

K to 12
Grade 2, Grade 4, Grade 3
Numbers and Number Sense
Educators, Learners
Creates problemswith reasonable answers involving multiplication or with addition or subtraction of whole numbers including money Divides 3 to 4digit numbers by 1to 2digit numbers without and with remainder Adds mentally 1 to 2digit numbers with sums up to 50 using appropriate strategies Creates word problems involving addition and subtraction of whole numbers including money Illustrates multiplication as repeated addition using groups of equal quantities arrays counting by multiples and equal jumps on the number line Illustrates the commutative property of multiplication Visualizes and represents division as equal sharing repeated subtraction equal jumps on the number line and using formation of equal groups of objects Adds 3- to 4-digit numbers up to three addends with sums up to 10 000 without and with regrouping.

Copyright Information

Education Services Australia
Reproduce, Use, Copy, Print

Technical Information

258.77 KB
Adobe Flash Player -