Question

LONG SUMS:

1. Check the following for equality and if they are equal, mention the

property.

[(-2) × 3] × 4 = (-2) × [3 × 4]

2. A postman can sort out 738 letters in 6 hours. How many letters can
be sorted in 9 hours?

3. Find the perimeter of a triangle whose sides are x + 3y, 2x + y and
x – y.

III. PRACTICAL GEOMETRY:

1. Construct a perpendicular bisector of the line segment AB = 7 cm.

2. Construct the angle 120° using ruler and compass only.​

Answer 1

Answer:

1.equal

associative property over multiplication

2.509 letters

3.4x+3y