Q&A - P5 Math

[tianzhu]

Hi moderators


Please help to delete.

This post is superseded by the blog.

Best wishes.

[chloecube]

needed help on this 2,thks


the number of marble lenny has is 1 less than 4 times that of Ryan’s. the number of marble that sam has is 6 more than 1/11 of lenny. sam has 10 fewer marble than ryan. how many marble do they have altogether?

tom spent 7/9 of his money on 6 chicken burger, 16 hamburger and 12 nuggets. he could spent all the remaining money on 4 chicken burger and 8 nugget, but changed his mind to spend it on hamburger only.
a) how many hamburger did tom buy with the remaining money?
b) if tom has $45, how much did each hamburger cost?

[tianzhu]

chloecube:

needed help on this 2,thks

the number of marble lenny has is 1 less than 4 times that of Ryan's. the number of marble that sam has is 6 more than 1/11 of lenny. sam has 10 fewer marble than ryan. how many marble do they have altogether?

Hi

A neat way is to use MD or you may use units.

Draw 1 box + 6 to show Sam.

Draw 11 boxes to show Lenny.

Ryan’s share ------- 1 box + 6 + 10 (Sam has 10 fewer marble than Ryan.)

11 boxes + 1 ------- 4 boxes + 64 (The number of marble Lenny has is 1 less than 4 times that of Ryan's.)

7 boxes ------ 63

1 box ------- 9

Please continue from here.

The answer is 139.

Best wishes

[PapayaDad]

tom spent 7/9 of his money on 6 chicken burger, 16 hamburger and 12 nuggets. he could spent all the remaining money on 4 chicken burger and 8 nugget, but changed his mind to spend it on hamburger only.

a) how many hamburger did tom buy with the remaining money?
b) if tom has $45, how much did each hamburger cost?

7u=6c+16h+12n

2u=4c+8n
1u=2c+4n
7u=14c+28n

since 7u = 7u ; so

6c+16h+12n = 14c+28n
16h = 8c + 16n (this is actually = 4u)
16h = 4u
2u = 8h ; can buy 8 hamburger with the remaining money

if he have $45; his remaining is 2/9 = $10 can buy 8 hamburger
each hamburger cost 10/8 = $1.25

[chloecube]

Thank you so much!!

[chloecube]

1001 card were given to 49 children. 3/7 were girls.each boy received the same number of cards. each girl received thrice as much as each boy.how many more card did the all girls received as all the boys?


is the answer 385?

[tianzhu]

chloecube:

1001 card were given to 49 children. 3/7 were girls.each boy received the same number of cards. each girl received thrice as much as each boy.how many more card did the all girls received as all the boys?


is the answer 385?

Hi

Please check your source because you'll end up with decimals.You are more likely to be given a card in a whole piece rather than partially.

Best wishes

[chloecube]

tianzhu:

chloecube:

needed help on this 2,thks

the number of marble lenny has is 1 less than 4 times that of Ryan's. the number of marble that sam has is 6 more than 1/11 of lenny. sam has 10 fewer marble than ryan. how many marble do they have altogether?

Hi

A neat way is to use MD or you may use units.

Draw 1 box + 6 to show Sam.

Draw 11 boxes to show Lenny.

Ryan’s share ------- 1 box + 6 + 10 (Sam has 10 fewer marble than Ryan.)

11 boxes + 1 ------- 4 boxes + 64 (The number of marble Lenny has is 1 less than 4 times that of Ryan's.)

7 boxes ------ 63

1 box ------- 9

Please continue from here.

The answer is 139.

Best wishes

hi tianzhu

went home sit down to look through the answer
i do not understand this part,
11 boxes + 1 ------- 4 boxes + 64 (The number of marble Lenny has is 1 less than 4 times that of Ryan's.)

since Lenny has 1 less than 4 times of Ryan, why his his 11 boxes +1? shldnt it be -1 instead?

in fact i do not quite comprehen the first sentence of this sum.
the number of marble lenny has is 1 less than 4 times that of Ryan's.

thks so much for helping

[tianzhu]

chloecube:

hi tianzhu

went home sit down to look through the answer
i do not understand this part,

Hi

I'll draw the MD and PM to you.

Please give me some time.

Please read your PM later this evening.

Have a good lunch.

Best wishes

[chloecube]

tianzhu:

chloecube:

1001 card were given to 49 children. 3/7 were girls.each boy received the same number of cards. each girl received thrice as much as each boy.how many more card did the all girls received as all the boys?


is the answer 385?

Hi

Please check your source because you'll end up with decimals.You are more likely to be given a card in a whole piece rather than partially.

Best wishes

hi tianzhu,
i just checked, no typo mistake. (not sure if the mistake is on the worksheet )
i got this from DS school worksheet

my method is below:
i drew 7 units, 3 units for girls and 4 units for boys
since each girl received 3times as each boy
so i put 3 in each unit of the girls and 1 for each unit of the boys
total 13 in each group
1001 / 13 = 77 groups
the number of boys get - 77 x 4 = 308
the number of girls get - 77 x 9 =693
693 - 308 = 385

i didnt use the \"49 children\" as a clue
is it correct?