The minuend is the number being subtracted from.

A subtrahend is a number subtracted from another.

The difference is the result after subtracting one number from another.

Partition is the act of splitting an object or value down into smaller parts.

Subtract 2 or 3-digit numbers using partitioning and bridging a multiple of 10

Maths

Add two 3-digit numbers using partitioning

Add two 3-digit numbers using adjusting strategies

Add 2 and 3-digit numbers by redistributing

Choose the most efficient strategy to add two 3-digit numbers

Subtract a pair of 2-digit numbers by finding the difference

Subtract 3-digit multiples of 10 by finding the difference between them

Choose the most efficient strategy to subtract from a 3-digit number

Use addition and subtraction to solve problems involving bar charts, pictograms and tables

Use addition and subtraction to solve problems in different contexts

In this unit pupils will add and subtract two 3-digit numbers using partitioning, adjusting, redistribution and bridging. In the future unit pupils will accurately and efficiently solve multi-step addition and subtraction problems. They will understand and explain how both addition and subtraction equations can be used to describe the same additive relationship.

In the prior unit pupils found pairs of number that composed 100 and positioned 3-digit numbers on a number line and estimated their position on unmarked number lines. They compared and ordered 3 digit numbers. In this unit pupils will add and subtract two 3-digit numbers using partitioning, adjusting, redistribution and bridging

In this unit pupils will add and subtract two 3-digit numbers using partitioning, adjusting, redistribution and bridging.

Informal and mental strategies for adding and subtracting two 3-digit numbers

The result after adding one number to another.

The result after multiplying two or more numbers.

The result after dividing one number by another.

The result after subtracting one number from another.

Which is the correct definition of difference?

What subtraction equation does this number line represent?

Find the difference between 270 and 160 using partitioning.

Find the difference between 430 and 310 using partitioning.

Find the difference between 540 and 360 using partitioning and bridging.

Find the difference between 670 and 490 using partitioning and bridging.

How many pentagons are there in this group of polygons?

Which of the following expressions give a difference of six?

Subtract 2 or 3-digit numbers using partitioning and bridging a multiple of 10

Lesson outcome