Order of operation.

Luca says that 14 + 2 × 5 = 85

Do you agree or disagree? You must justify your answer.

Allow students to do it and give their answers.

Use the whiteboard to explain more examples.

1. 22 + 8 × 4 =

2. 25 – 8 – 5 =

3. 10 × 5 – 3 × 5 =

4. 24 ÷ 8 – 4 =

5. 12 + 9 ÷ 4 + 3 =

ROOM 1

1. 18 + 8 X 2 =
2. 26 - 4 X 2 =

ROOM 2

1. 14 + 8 - 11 =
2. 45 - 23 + 29 =

ROOM 3

1. 20 - 3 - (2 + 7 ) =
2. ( 12 - 4 ) X ( 8 - 5 ) =

Emphasize the order of operation.

Students to present their work in the next lesson.