Subtracing Whole Numbers Lesson 4 Chapter 4

' Note: Don't mind the lines i just need them to put the numbers in place.

1) Bob reserched the number of people who like tacos in canada and those who dislike eating tacos.
Year____________ ___1997 ___ 2005
# of people who like tacos ___9390 ___10900
# of people who dislike tacos _3922 ____4758

1a) In 1997 , how many people in canada liked tacos more then dislike tacos?
1b) In 2005 , how many people in canada liked tacos other then dislike tacos?
1c) Did you use mental math, pencil and paper or a calculator to calculate? Jusitfy your choice.
1d)Use addition or esimation to determine if your answers are reasonable. Show your work?

2) Calculate. Determine if your anwsers are reasonable . Show your work.
A) 5300 - 2679 = C) 96230 - 9235 =
B) 9500 - 5986= D) - 6969 = 60000

3)Mr graham was looking at all the players who tried to play in the world cup . There were 8000 people who tried. 925 players made it into the world cup . How many players didn't making it into the world cup?

Medium:
4)In the 2004 Paralympics there were 5000 athletes. In the 2000 Paralympics there were 4267 atletes. Estimate and calculate how many more athletes were in the 2004 Paralympics then in the 2000 Paralympics .

5) Create 3 problems involving the subtraction of two multi-digit numbers. Solve your problems.

Hard:
6a) Write down 2 four-digit whole numbers with four different digits. Rearrange the digits to make the greaest and the least four-digit whole numbers.
b)Subtract the 2 lowest number from the 2 greatest number. Estimate to check your answer.
c) Use your 2 answers from part b) to make the greast and least numbers. Repeat theses steps until you start to get the same number each time.
d) Subtract your final number from part c) to 10000.