16. (3+2)+20=____+(2+20) (associative)

A.3
B.2
C.20
D.25
17. 6x(5+10)=(___x5)(6x10) (distributive)

A.6
B.5
C.10
D.90
18. 9x5=____x9 (commutative)

A.9
B.5
C.45
D.50
19. 3+15+57=____+3+57 (associative)

A. 3
B. 15
C. 57
D. 75
20. (45+0)+(1x50)=(___+0)+(1x50) (identity/zero)

A.0
B.45
C.1
D.50
21. What is the perimeter of a triangle of sides are 32 cm, 25 cm and 28 cm?

A.85cm
B. 90cm
C. 95cm
D. 100cm
22. One side of a square is 15 cm, what is the perimeter of the square?

A.30cm
B.45cm
C.50cm
D.60cm
23. A neckerchief measures 45 cm by 45cm by 80cm. What is the perimeter of the neckerchief?

A. 150cm
B.160cm
C.170cm
D.180cm
24. A rectangular lot measures 5m by 8 m. Given its length and width find its perimeter

A. 13m
B.26m
C.40m
D.45m
25. What is the distance round the building which is 10m long and 8m wide?

A.16m
B.2m
C.18m
D.36m