© Hamilton Trust Keeping Up Term 1 Week 3 Day 3

Objectives:• Subtract two-digit numbers from two-digit

numbers and from numbers between 100 and 200 by counting back or by counting up

• Choose when to use each strategy

Subtraction - Objectives

© Hamilton Trust Keeping Up Term 1 Week 3 Day 3

Subtraction – Whole ClassWork in pairs

Will you count up or count back?

Discuss with a partner how you will do each subtraction.

76 – 31 71 – 36

84 – 20 84 – 19

125 – 41 118 – 54

© Hamilton Trust Keeping Up Term 1 Week 3 Day 3

Subtraction – Individual PracticeUse ‘counting back’ to solve these subtractions.

75 – 41 75 – 29

94 – 41 94 – 29

116 – 41 116 –

29

127 – 41 127 - 29

© Hamilton Trust Keeping Up Term 1 Week 3 Day 3

Subtraction – Whole ClassWould you use ‘counting up’ or ‘counting back’ to

solve these subtractions?

58 – 27 58 – 22

95 – 39 138 – 75

143 – 22 110 – 19

© Hamilton Trust Keeping Up Term 1 Week 3 Day 3

Subtraction – Paired Work

820 1 4 53 96 7

Work in pairs.• Choose two card numbers each. Use these to create a 2-digit

number. • Write it down. For example, if you choose 4 and 7 you could

make 47 or 74. • Look at your two numbers and each subtract the smaller from

the larger. Record your calculation.• Check your answers together – do you agree? • Repeat this five times.