Q&A - P5 Math
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imacsg:
oops..I read the question as 1/5 of class in front and 7/9 of class behind --> should be 1/5 of classmates (ie total number -1) in front and 7/9 class behindMathIzzzFun,
Thanks, I also have 45 as the ans.
But the ans is 36, I think the ans is wrong.
Total number in class --> 9u
Pupils in front --> 2u-1, class mates --> 9u-1
so, 2u -1 : 9u-1 = 1 : 5
cross multiply/equalize:
10u-5 = 9u-1
1u--> 4
total number in class --> 36
cheers. -
Hi MathIzzzFun,
You are sharp, I also did not notice that. Thanks -
imacsg:
solution using MD..Hi MathIzzzFun,
You are shape, I also did not notice that. Thanks
http://i48.tinypic.com/33dfplz.png\">
cheers. -
MathIzzzFun:
Maximum number of blocks that can be cut is 54Udon:
Please help to explain the answer provided for this Question...Thanks.
Q1. What is the maximum number of wooden blocks measuring 0.03m by 0.02m by 0.06m that can be cut from a big block of wood measuring 12 cm by 11 cm by 15 cm?
Given answer:-
0.03m x 100 = 3 cm
0.02m x 100 = 2 cm
0.06m x 100 = 6cm
12 divided by 6 = 2
why 12/6, why not the \"length / length and the breadth / breadth and the height / height manner? :?:
11 divided by 2 = 5 R 1
15 divided by 3 = 5
2 x 5 x 5 = 50
The maximum number of wooden blocks that can be cut is 50.
Best Regards
Udon
http://i47.tinypic.com/1251jeq.png\">
cheers.
Thank you very much for your help, think the child wont be able to visualize but I believed some children they can... -
Appreciate your help to solve these questions from Henry Park 2011:
Q7. Cheryl and Serene have some money. If Cheryl gives Serene $20, they will have the same amount of money. If Serene gives Cheryl $25, Cheryl will have twice as much money as Serene. How much money does Serene have.
http://i49.tinypic.com/98bqz4.jpg\"> -
terilyn:
HiAppreciate your help to solve these questions from Henry Park 2011:
Q7. Cheryl and Serene have some money. If Cheryl gives Serene $20, they will have the same amount of money. If Serene gives Cheryl $25, Cheryl will have twice as much money as Serene. How much money does Serene have.
Hope this helps.
Best wishes
http://farm9.staticflickr.com/8034/8022550020_fcd7227393_z.jpg\"> -
Hi
For the second question
Triangle
Shaded : unshaded ------ 2:3 (5)
Rectangle
Shaded : unshaded ------ 2:13 (15)
Fraction of whole figure is unshaded ------ (13+3)/(13+3+2) --------- 16/18 -------- 8/9
Best wishes -
Hi, need help with this Qn:
Henry has some 10-cent, 20-cent and 50-cent coins. The ratio of the number of 10-cent coins to the number of 20-cent coins is 7:2. The number of 50 cents coins is 1/2 the number of 20-cent coins. The total value of the 10-cent coins is $16 more than the total value of 50-cent coins. How much does Henry have altogether?
Thanks. -
YumYum:
HiHi, need help with this Qn:
Henry has some 10-cent, 20-cent and 50-cent coins. The ratio of the number of 10-cent coins to the number of 20-cent coins is 7:2. The number of 50 cents coins is 1/2 the number of 20-cent coins. The total value of the 10-cent coins is $16 more than the total value of 50-cent coins. How much does Henry have altogether?
Thanks.
You may use “Number*Value” method.
10-cent -------- 7*10 ------- 70u
20-cent ------- 2*20 ------- 40u
50-cent -------- 1*50 ------ 50u
70 -50 ----- 20
20u ------- 1600
1u ------- 80
Altogether, he had 160*80 ------ $128
Best wishes -
need some guide for the following questions.
1) ada and siti had some stamps in the ratio of 3:4.
after Ada bought 5 more stamps and siti gave away 1/5 of her stamps, they had the same number of stamps.
How many stamps did siti give away and what was the total number of stamps for 2 girls at first?
2)there were 1600 participants in a game. 30% were male participants.
when more male participants joined in, the male participants were increased to 60%. How many male participants joined in the contest?
is the answer : 1200 for this question?