UNIT STARTER – BACK TO SCHOOL
Lesson 5B – Numbers 21 - 100

UNIT STARTER
Lesson 5B
We're learning…
- Review numbers 21 – 30 and
multiples of 10 to 100
- Ask and answer questions using the
structure “A plus/minus B is C”
- PB p.7
- AB p.8

WARM - UP
Song: Count to 100

-

Listen to the song.
Clap your hand and
sing along.

GRAMMAR:

What's
this?

+
plus

GRAMMAR:

What's
this?

minus

GRAMMAR:

What's
this?

=
is

GRAMMAR:

12 + 15 = 27
twelve plus fifteen is
twenty-seven

GRAMMAR:

36 - 10 = 26
thirty-six minus ten is
twenty-six

PRACTICE:

11 + 12 = 23
eleven plus twelve is
twenty-three

PRACTICE:

36 - 11 = 25
thirty-six minus eleven is
twenty-five

PRACTICE
Let's play!

- Divide students into groups of four.
- Have students look at the calculation
and choose the correct answer: A, B
or C.
- 1 correct answer = 1 point.
- All students say aloud the answer.

START

Read and choose!

1. Forty plus thirty
seventy
is________.

sixty

eight
y

sevent
y
Click on the correct mole to show the answer.

twenty-two
2. Twenty-eight plus
____________ is
fifty.

twentyfour
twentythree

twentytwo

3. Sixty minus twenty
is
fort
_____.

y

forty
fifty

sixty

4. Twenty-five minustwelve
_______ is thirteen.

eleve
n
twelve

ten

5. Eighty minus twenty
is
sixt
_____.

y

sixty
fifty

forty

Thirty-one
6. ____________ plus sixty-nine is one
hundred.

twentyone
forty-one

thirty-one

STOP

PUPILS' BOOK (p.7)
Answers

30
35

45

50

67

72

88

90

94

PUPILS' BOOK (p.7)
Answers

seventy
twenty-two
forty
minus
Thirty-one

Listen

WRAP-UP

What have you learnt
today?
plus, minus

eleven plus twelve
is twenty-three

Students call out all the phrases of the numbers and calculations.

WRAP-UP:

11 + 12 = 23
eleven plus twelve is
twenty-three

WRAP-UP:

36 - 11 = 25
thirty-six minus eleven is
twenty-five

HOMEWORK

- Review vocabulary and grammar.
- Do exercises 2, and 3 in the Activity book
(page 8).

- Check answers in the Teacher's book (page 30) or Active Teach.

UNIT STARTER: BACK TO SCHOO:
We're learning…