Show:
Addition
Subtraction
Multiplying
Division
Angles
100

6+7

13

100

9-3

6

100

5203x0

0

100

464/1

464

100

Draw an acute angle on the board.

Answer on board. 

200

20+13

33

200
18-6

12

200

4,543X1

4,543

200

56/1

56

200

Draw an obtuse angle on the board

Drawing on the board.

300

22+88

110

300

22-12

10

300

6x5

30

300

4/2

2

300

Draw a straight angle

Drawing on the board. 

400

47+24

71

400

67-18

49

400

9x10

90

400

20/5

4

400

Draw a right angle on the board.

Drawing on the board. 

500

234+572

806

500

124-72

52

500

12x7

84

500

20/20

1

500

How many degrees is a right angle?

90 degrees