Q&A - P5 Math
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thanks
The Right Equation:
this qn uses drop-down model + working backwards. http://i40.tinypic.com/2ceqnm9.jpg\">carol73:
hi
pls help
1) Jamie spent $6 less than 4/7 of her money on a dress. She spent $6 more than 1/2 of ther remaining amount of money on a blouse. If she had $24left, how much money did she have at first -
Thank you, The Right Equation!
You are GREAT!!! -
The Right Equation:
http://i43.tinypic.com/28376d.jpg\">jas3angels:
Hi, please help....thanks.
Jeremy had a container filled with a number of20-cent, 50-cent and $1 coins. 1/5 of the 20-cent coins equal to 2/3 of the 50-cent coins. There were 3/8 as many 50-cent coins as $1 coins. If the total value of these coins was $6900. How many coins did Jeremy have altogether?
Thanks The Right Equation.
is it possible to explain in model? -
Sandra has twice as many apples as oranges at first. She removes 4 apples and 3 oranges each time. In the end, there are 18 apples and 1 orange left. What is the total number of fruits Sandra had at first?
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swordtail:
Sandra has twice as many apples as oranges at first. She removes 4 apples and 3 oranges each time. In the end, there are 18 apples and 1 orange left. What is the total number of fruits Sandra had at first?
Hi
A neat way is to use MD.
She removes 4 apples and 3 oranges each time.
Use 4 units to show 4 apples and 3 units to show 3 oranges.
18 + 4 units ------ 2 parts
1 + 3 units ------ 1 part
Hence , 2 + 6 units ------- 18 + 4 units
2 units ------ 16
This gives 1 unit ------ 8
Number of apples ------ 18 + 32 ------ 50
Number of oranges ------- 25
Total number of fruits -------- 75
Best wishes -
Hi pls help
Trianne baked 4 cakes. She kept 1/3 of a cake for herself and gave the rest to her friends, if each of her friends received 1/3 of a cake. how many friends received the cake? -
Sandra has twice as many apples as oranges at first. She removes 4 apples and 3 oranges each time. In the end, there are 18 apples and 1 orange left. What is the total number of fruits Sandra had at first?
Tianzhu,
tks for the solution. But could you draw the model drawing? Still a bit confused, like how do you get the 6 units? tks
tks for your solution -
carol73:
Hi pls help
Trianne baked 4 cakes. She kept 1/3 of a cake for herself and gave the rest to her friends, if each of her friends received 1/3 of a cake. how many friends received the cake?
4 cakes. each cake cut into 3 parts.
in total there are 12 parts.
she kept 1 part for herself.
left 11 parts. gave to 11 friends... each friend get 1 part (ie. 1/3 of a cake)
answer is 11. -
swordtail:
Sandra has twice as many apples as oranges at first. She removes 4 apples and 3 oranges each time. In the end, there are 18 apples and 1 orange left. What is the total number of fruits Sandra had at first?
[18] keep adding 4
[01] keep adding 3
[18][22][26][30][34][38][42][46][50]
[01][04][07][10][13][16][19][22][25] -
swordtail:
\"18 + 4 units ------ 2 partsSandra has twice as many apples as oranges at first. She removes 4 apples and 3 oranges each time. In the end, there are 18 apples and 1 orange left. What is the total number of fruits Sandra had at first?
Tianzhu,
tks for the solution. But could you draw the model drawing? Still a bit confused, like how do you get the 6 units? tks
tks for your solution
1 + 3 units ------ 1 part\"
you get 2 + 6 units by multiplying the second line by 2
i.e. 2 + 6 units ------ 2 parts
Therefore, 18 + 4 units = 2 + 6 units since both are equivalent to 2 parts.