© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Objective:• Subtract one, two or three-digit numbers by

counting back.

Subtraction – Objectives

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Direct Teaching

Counting back to subtract numbers looks like this:

300293

-7<

258 265 272 279 286

< << < <-7-7-7-7-7

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Student Activity

Write 523 at the top of a sheet of paper.Subtract 6 and write the new number

underneath.

Keep subtracting 6… How low can you go in 2 minutes?!

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Direct Teaching

Counting back to subtract a 2-digit number:

310 – 43 =

310

-40-3

267

<<

267 270

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Direct Teaching

Counting back to subtract a 3-digit number:

748 – 201 =

748

-200-1

547

<<

547 548

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Direct Teaching

Counting back to subtract a 3-digit number:

835 – 199 =

835

-200+1

636

<<

635 636

© Hamilton Trust Keeping Up Term 3 Week 3 Day 1

Subtraction – Individual practiceIt’s drill time again…

Aim to be a subtraction sergeant!

431 - 7431 - 27431 - 207556 - 70

302 - 8303 - 52304 - 198736 - 420

517 - 298571 - 53924 - 299768 - 370