Some Number Problems

I have done some maths activities today. And I don’t think I learnt anything new, but I do know that I have done the work any ways.

What I have learnt :

I learnt to work with big numbers in multiplication.

My evidence :

 

Maths Problems.

Every hour I used 50 ml of sunblock to protect me from the sun. How much sunblock did I use for the 6 hours I was at the fair?

50 ml x 6 = ?

300 ml of sunblock was used at the fair because,

5 x 6 = 30, but it was 50 x 6 = 300.

Fraction Problems.

I have learnt how to use multiplication and division to solve a fraction problem.

E.g - Five people share an apple pie equally. Each person gets 1/5 of the pie.

25 slices of apples are put on top of the pie, which are also spread evenly amongst the slices of pie.

How many apple slices does each person get?

Answer: Each person gets 5 apple slices on each piece of pie.

5 divided by 25 = 5            5 x 5=25

Multiplication

I am learning to use Multiplication strategies in level 3.

1.    When Jasmine makes lemonade she uses 6 lemons for every litre of water. How many lemons does she need for

i)     2 litres of water?   12 -  6x2=12 - 6 doubled = 12

ii)    3 litres of water?   18 - 6x3=18 - 6 tripled is 18

iii)   10 litres of water?  60 - 6x10=60

2.   Devinda is doing some baking. When he uses his mum's recipe he can make 8 muffins. When he doubles the recipe he gets 16 muffins. How many lots of the recipe does he need to make

i)     24 muffins?     24x8=? - 10x8=80 - 10x8=80 - 80+80= 160. 8x4= 32 +160= 192

ii)    32 muffins?     32x8=? - 10x8=80 - 80 tripled is 220. 8x2=16+220= 236

iii)   56 muffins?      8x56=? - 8x10=80 - doubled 5 times = 80 doubled is 160. 160 doubled is 320 + 80 = 400. 8x6= 48 400+48=448

 

Fractions

I am able to work out Fraction problems in level 3.

A farmer is selling some of his animals.

1.  The farmer sells ¼ of his 72 cows.  Show how to work out how many cows he Sell.

1/4 of 72.

72 divided by 4= 18

18 x 1 = 18

4 x 18 = ?

2 x 18 = ?

2 x 10 = 20

2 x 8 = 16

20 +16 = 36

36 doubled = 72

4 x 18 = ?

2 x 18 = ?

2 x 10 = 20

2 x 8 = 16

20 +16 = 36

1/2 of 36 is 18

36 doubled = 72 = 144

2. He sells ⅓ of his 45 pigs.  Show how to work out how many pigs he sells.

1/3 of 45

45 divided by 3 = 15
15 x 1 = 15

3.   He sells ⅙ of his 84 sheep.  Show how to work out how many sheep he sells.

1/6 of 84

84 divided by 6 = 14
14 x 1 = 14

Addition and Subtraction

I am able to work out addition and subtraction strategies in level 3.

1.  Maraea is saving to buy a cat.  In 3 weeks she has saved $9, $56 and $72.

Show how to work out how much she has saved altogether.

$72+$56+$9=?

$72+$8=$80.

$56+$1=57.

$80+$50=$130+7=137

2.  Tom saves his money each month to buy a dog.  In 4 months he has saved $36, $78, $203, and $123.  Show how to work out how much he has saved altogether.

$203+ $123+ $78+36=? -

$200+$120=$320

$80+$40=$120

$120+$320=440

3.   Te Ao is saving to buy a horse.  So far she has saved $17, $160, $72, and $148.  Show how to work out how much she has saved altogether.

$160+$148+$72+$17=? -

70+20=90-5=85.

150+160= 310+85=395

4.  Petelo has $ 147 as a present.  He spent $78 at the shop.  How much has he got left?

147-78=?

150-80=70-5=65