RECTANGLE PERIMETER

 Find the perimeter of the following rectangle. (diagram not to scale)

Solution

Length=60 cm, Width = 20 cm

Perimeter = 2(length + width)

                   = 2( 60 + 20)

                   =2 x 80

                   =160cm

Hence Perimeter is 160cm

LCM

Find the LCM of 50 and 60.

Solution    

ALGEBRA - 2

If  1m  =  50; find m

     8

Solution

1m  =  50

8

¹8 x 1m  =  50 x  8     multiply by 8 on both sides

      ₁8

1m = 50 x 8

m = 400

Hence m = 400      

 

ALGEBRA - 1

If 4y = 32; find y

Solution

4y = 32

4y  =32          dividing by 4 on both sides

4       4

y = 8 

Hence y = 8     

 

CIRCLE PERIMETER - 1

Find the perimeter of the following circle

solution

P = 2 x ∏ x r

   = 2 x 22 x 560⁸⁰

             7₁

   = 2 x 22 x 80

   = 44 x 80

   = 3520m

Hence perimeter = 3520metres.    

AREA OF TRIANGLE - 2

Area of triangle is 80cm². If base is 40m, find height.

Solution

 

You can draw a simple diagram as shown below

 

 

Area =  1 x base x height

              2

 

Let height = h

80 =  1 x 40  x h

          2

80 =  1 x 40²⁰ x h,     canceling by 2

          2₁

80 =  1 x 20  x  h

 

80 = 20h

            

⁴80 =  ¹20h

₁20     ₁20

h = 4cm

 

hence height is 6cm

AREA OF TRIANGLE - 1

Find the area of the following figure

Solution

              Area =  1 x base x height

                           2

             base=15cm, height=20cm.

              Area =  1 x 15 x 20

                           2

              Area =  1 x 15 x 20¹⁰     [canceling by 2]

                          2₁

              Area =  1 x 15 x 10

            

              Area =  150

                                              Hence Area is 150 cm²

WELCOME!!!

Hello. This is a platform prepared for parents, teachers and primary pupils. As we know, mathematics is so challenging. To meet the needs of the basics of mathematics in the primary school level, we have prepared some examples and questions for you. Don't hesitate to give your comments whenever you find it convenient. Welcome all and be blessed.

By Ndamugoba Ivan.