Monday, April 19, 2010

Lalang Group

Fred spent $4357 on a tour. Tim spent $230 more than Fred.
How much did Tim spend on the tour?

Amy's solution: 4357 - 230 = 4127
Tim spent $4127.

There is something wrong with Amy's solution.

1. Explain the mistake in Amy's solution.
2. Show how you would find the answer to the problem.

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Orchid Group

The mass of a lion is 180kg.
A cow is 36kg lighter than the lion.
Find the total mass of the two animals.

Ben's solution: 180 + 36 = 216
The two animals have a mass of 216kg.

There is something wrong with Ben's solution.

1. Explain the mistake in Ben's solution.
2. Show how you would find the answer to the problem.

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Hibiscus Group

Mary has 60 ice-cream sticks. Ted has 150 more ice-cream sticks than Mary.
Samy has 50 fewer ice-cream sticks than Ted.
How many ice-cream sticks do they have altogether?

Tony's solution: 60 + 150 = 210
210 - 50 = 160
210 + 160 = 370
They have 370 ice-cream sticks altogether.

There is something wrong with Tony's solution.

1. Explain the mistake in Tony's solution.
2. Show how you would find the answer to the problem.
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12 comments:

  1. jarelApril 23, 2010 at 11:03 AM

    lalang group
    4357+230=4587

    ReplyDelete
  2. Brian Kiong Kpk PingApril 23, 2010 at 11:03 AM

    150+60=210 210-50-60=100 They have 100 ice-cream stick altogther

    ReplyDelete
  3. litingApril 23, 2010 at 11:08 AM

    it is suppose to be 4357 +230=4587

    ReplyDelete
  4. AnonymousApril 23, 2010 at 11:08 AM

    180-36=154
    180+154=334
    the two animals have a mass of 334kg

    ReplyDelete
  5. ellamacaisaApril 23, 2010 at 11:08 AM

    IT should be 4357+230=6487


    lalang's group

    ReplyDelete
  6. keir audrey (3f)April 23, 2010 at 11:10 AM

    mary's ice cream = 60+150=210 150 more is ted's ice cream. so samy's ice cream = 50 fewer ice creams =210 -50= 160. so the childrens have = 160+210=370.



    done by: audrey , hibiscus group!

    ReplyDelete
  7. GERARDApril 23, 2010 at 11:13 AM

    60+150=210,ted
    210-50=150,sammy
    210+150=360
    360+60=520

    ReplyDelete
  8. hilfiApril 23, 2010 at 11:14 AM

    39-2=37

    ReplyDelete
  9. yu-henApril 23, 2010 at 11:14 AM

    180-36=154
    180+154=334
    The two animals have a mass of 334kg

    ReplyDelete
  10. AnonymousApril 23, 2010 at 11:14 AM

    60+150=210
    210-50-60=100

    ReplyDelete
  11. mohamed nurez bin nur mohamedApril 23, 2010 at 2:00 PM

    4357-4127=230
    230+230=460

    tim spent $460 in the tour

    ReplyDelete
  12. UnknownApril 24, 2010 at 9:44 PM

    1) Tony did not add Mary's ice-cream sticks. He only added Ted and Samy's sticks.

    2) Mary has 60. Ted has 60+150=210. Samy has 210-50=160.
    60+210+160=430.

    They have 430 altogether.

    ReplyDelete

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