Singapore Math - Primary 6 Ratio
Автор: Singapore Math
Загружено: 2019-09-01
Просмотров: 13808
Описание:
For more Singapore Math problems check out my channel at / @inspiredlearning
This video shows how to resolve the ratio word problems of the specific type "Both quntity change".This video is based on Singapore Math, using models to solve mathematical problems. Using models to solve problems helps us understand algebra from a visual perspective, and clearly shows what is happening behind x and y :).
The question being solved in this video:
There were some marbles at a shop. The ratio of the number of red marbles to the number of blue marbles was 2:3. When 50 more red marbles and 30 more blue marbles were added, the ratio of the number of red marbles to the number of blue marbles became 5:6. How many marbles were there at first?
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