Singapore Math Training

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Presentation transcript:

Singapore Math Training

Singapore Model Drawing Method Alice earned money from tips from her waitress job. She put ¼ of the money in her savings account. She gave ¾ of the remaining money to the local food bank. She had $12 left for herself. How much money did Alice earn in tips?

Let’s Get Started!

Step 1: Read the entire problem and underline the question. Alice earned money from tips from her waitress job. She put ¼ of the money in her savings account. She gave ¾ of the remaining money to the local food bank. She had $12 left for herself. How much money did Alice earn in tips?

Step 2: Rewrite question as an answer statement. How much money did Alice earn in tips? becomes… Alice earned _________ in tips.

Step 3: Determine who and/or what is involved in the problem. Alice earned money from tips from her waitress job. She put ¼ of the money in her savings account. She gave ¾ of the remaining money to the local food bank. She had $12 left for herself. How much money did Alice earn in tips?  

Step 4: Draw a Unit Bar(s) Alice’s Tips

Step 5: “Chunk” the Problem Draw in information that you know 1/4 Alice’s Tips savings

Food bank contribution Step 5: “Chunking”… Continue to fill in information that you know… 1/4 Alice’s Tips savings Remainder Can you see what each fourth is equal to in the bottom bar? Food bank contribution $12 3/4

Step 6: Perform Calculations 1/4 Alice’s Tips savings Remainder Each fourth is equal to $12, We use the calculation $12 x 4 = $48 So, we know the remainder was $48. Food bank contribution $12 $12 $12 $12 3/4

Step 6: Perform Calculations Remainder($48) 1/4 Alice’s Tips savings $16 $16 $16 On the top bar, the Remainder is divided into thirds. $48 / 3 = $16 Food bank contribution $12 3/4

Food bank contribution Step 7: Conclusion Remainder ($48) 1/4 Alice’s Tips savings $16 $16 $16 $16 We see that each fourth on the top bar is equal to $16. So, the total tips that Alice earned were $16 x 4 = $64 Food bank contribution $12 3/4

Food bank contribution Step 7: Conclusion Alice earned $64 in tips. 1/4 Alice’s Tips savings $16 $16 $16 $16 Food bank contribution $12 3/4

YOU TRY! (on a separate sheet of paper) There are 600 people at a beach. 2/3 of them are men while the rest are women and children. 1/3 of the number of women equals to ½ of the number of children. If 1/10 of the women and ¼ of the children cannot swim, how many women and children can swim?