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primary 6 | Maths
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Mike
Mike

primary 6 chevron_right Maths chevron_right Singapore

Please teach me. Thank you

Date Posted: 4 years ago
Views: 246
J
J
4 years ago
Before : Benny 1 unit, Danny 4 units
Difference = 3 units

After :

1/5 more means that
Benny 5 units, Danny 6 units
Difference = 1 unit

Notice that they bought the same number of marbles. So the difference remains the same. We make the units the same.

Multiply by 3 ,

After : Benny = 15 units , Danny = 18 units
Difference = 3 units

Difference between before and after
= 15 units - 1 unit = 14 units
(Or 18 units - 4 units = 14 units)

So 14 units = 70 marbles

1 unit = 70 marbles ÷ 14 = 5 marbles


Total marbles at first
= 1 unit + 4 units
= 5 units

= 5 x 5 marbles
= 25 marbles.
Mike
Mike
4 years ago
Thank you

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Zhining
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Mike
Mike
4 years ago
Thank you very much