Gerry Lim's answer to Bernice's Primary 6 Maths Data Analysis Singapore question.
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First problem is that we don't know what 1 line represents how many coins on the graph. But we do know she has same nimber of 50 cents and 20 cents coins.
Guess and check:
20 x 50cents - 20 × 20cents = $6
30 x 50cents - 30 × 20cents = $9
So she has 30 of each 50 cent and 20 cent.
Then since they have 6 lines on the graph,
30 ÷ 6 = 5. 1 line represents 5 coins.
So $27 - 30 × 50cents - 30 x 20cents =$6
And $6 ÷ 10cents = 60 coins
Guess and check:
20 x 50cents - 20 × 20cents = $6
30 x 50cents - 30 × 20cents = $9
So she has 30 of each 50 cent and 20 cent.
Then since they have 6 lines on the graph,
30 ÷ 6 = 5. 1 line represents 5 coins.
So $27 - 30 × 50cents - 30 x 20cents =$6
And $6 ÷ 10cents = 60 coins
Date Posted:
2 years ago
Srry but i dont understand from this mayne if you showed the drawing and working on paper i would understand abit more. Thank you for your help though!
Not quite clear
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