MATHS

He is My Maths Work that we have done this Week

Marilyn needs to fertilise her front lawn. It measures 20 metres by 35 metres. Each bag of the fertiliser that she plans to use covers approximately 200m2. How many bags should she buy?

Remember: length X width

1.

20 x 30  = 600

20 x 5 = 100

100  +  600 = 700

20 x 35 = 700

2.

700 ÷ 2 = 350

700 ÷ 200 = 3.5

She will have to by 4 but use have of the 4 bag so then that makes 3.5.

2) Mr Masua needs to fertilise our school lawn. It measures 35 metres by 40 metres. Each bag of the fertiliser that he plans to use covers approximately 200m2. How many bags should he buy?

30 x 40 = 1200

40 x 5 = 200

1200 + 200 = 1400

40 x 35 = 1400

1400 ÷ 2 = 700

1400 ÷ 200 = 7

The strategy I used was called Place value partitioning

Decimals maintenance (Write down the strategies you use)

Sally was painting her house. She needed 0.48 litres for each wall of her kitchen and 1.34 litres for each wall of her bedroom.

How many litres does she need for the kitchen? The answer is 1.92      4 x 40 = 160

4 x 8 = 32

160 + 32 = 192

How many litres does she need for the bedroom?

134 x 4 = 536 then I put the decimal point in the 5 and the 3

3.98 + 12.34 = 16.32

0.089 + 0.834 = 0.923

Which is bigger? 0.89 or 0.782 0.89

0.98 - 0.234 = 0.746

0.5 - 0.24 = 0.19

12.89 - 9.242 =3.648