Home Home



Home > Grades K-2 > Math > Math Challenge >















 

Spending Spree

Problem #85
Deadline to submit the solution: November 30th, 2002

Jim's candy bar costs ¢39 while my bag of jelly beans costs ¢59.
Laura's pack of gum costs ¢29 and John's popsicle costs ¢19.

Q1. How much money did we spend on sweets altogether?

Q2. What's the quick and easy way of finding the total sum?



Solutions

Daniel Guo from USA
Grade: K 1 Age: 5
Solution:
Q1: 39+59+29+19=146
Q2: 40+60+30+20-4=146


About me: I like to go to school.
-----------------------------------
dina from malaysia
Grade: 2 Age: 8
Solution:
Q1: 146
Q2: adding and multiply

1. Add the tens number : 50+30+20+10 = 110 2. Multiply the ones number: 9 X 4 =36 3. Total up both :110+36=146
About me: i love choclates
-----------------------------------
Eddie Liu from U.S
Grade: 4 Age: 9
Solution:
Q1: 146
Q2: Turn the 9's into 0

The easy way to do this problem is to turn 39 into 40, 59 into 60, 29 into 30, and 19 into 20. Add these up. 40+60=100 and 30+20=50 100+50=150. But you have to subtract the number of 9's turned into 10's.I turned 4 9's into 10's so 150-4=146, which is the answer!
About me: I like to play even though I rarly can do so .
-----------------------------------
Cricket from US
Grade: 2 Age: 7
Solution:
Q1: $1.46
Q2: rounding


About me:
-----------------------------------
Cricket from US
Grade: 2 Age: 7
Solution:
Q1: $1.46
Q2: rounding

First I rounded each number to the nearest tens place. Then I added them up to get a rounded answer. But I had to adjust it to get the correct answer by subtracting 1 from each price four times ($1.50-.04). That gave me the true amount they spent on sweets, which was $1.46!
About me: I like school I am an artist. I have a big family mommy's going to have her first baby boy after four girls
-----------------------------------
Karisma from USA
Grade: 2 Age: 7
-----------------------------------
Karisma from USA
Grade: 2 Age: 7
-----------------------------------
sQUIRLY from USA
Grade: 2 Age: 7
-----------------------------------
Bryan Parker from United States
Grade: 7th Age: 13
-----------------------------------
sarat from u.s.a.
Grade: 2 Age: 7
-----------------------------------
Shashank Chitta from U.S.A.
Grade: First Age: 6
-----------------------------------
Dianara from Canada
Grade: 5 Age: 10

 

 



 


Home
Site Map Comments Parents Teachers Privacy Policy and Terms of Use
K-2 ( Math, Language Arts 3-4 ( Math, Language Arts 5-8 ( Math, Language Arts)
All Ages (MindTwisters, Games) Advertise

info@dositey.com

Copyright ©Dositey Corporation 1998-2005