Phylicia Tong's answer to PurpleOlive's Primary 5 Maths Whole Numbers Singapore question.
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Is this better?
Date Posted:
5 years ago
Grateful thanks for rendering your help. It looks like my child is still confused why there are two times of blue marbles.
In that case can i suggest this... Use smaller numbers for this question, say R +G =9, B = 3. Total =12. Take 12 counters, say beads or lego bricks, only need to differentiate for blue color; for red n green, the colors don't matter as we are solving for blue. After that, 'act it out'. All the best for your child.
Okay, we will try again. Thank you so much for your time. Have a lovely evening ahead!
It's not that there are 2x of blue marbles. It's that when we make the number of (green+red) marbles equal to the number of blue marbles, the total number of marbles is the same as 2 times the number of blue marbles.
It's like saying ,
green+red marbles = 1u.
Blue marbles = 1u
Total = 2u = 102
So we can use this knowledge to find how many blue marbles there are.
It's like saying ,
green+red marbles = 1u.
Blue marbles = 1u
Total = 2u = 102
So we can use this knowledge to find how many blue marbles there are.
Yup, from MODEL, if you 'cut away' the 18 from (R+G), the NUMBER of (R+G) = NUMBER of blue marbles. It is TANTAMOUNT to 2 groups of blue marbles. Cheers.
Yup tutor Phylicia is right. Hope your child can understand
Dear tutors, thank you very much for helping us.
Thank you for the steps and the answer to the question . Thank you and I will practice on it further. Have a great day ahead.
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