Number Chart Activities - 100 Square
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3Number Chart Activities - 100 Square
1.
Look at any 2 x 2 square. Add up the two numbers that are diagonal to each other?
What do you notice about the answers?____________________________________
2.
Look at any 2 x 2 square. Add up the two numbers that are on the top row. Add up the
two number that are on the bottom row.
If you subtract the sum of the numbers on the
top row from the sum of the numbers of the bottom row, what number do you get?
answer _____
Look at another 2 x 2 square and try it again. What number did you get?
______
What do you notice about the answers?____________________________________
3.
Look at any 2 x 2 square. Look at the digits in the squares. What do you notice about
the digits? _____________
How many of each digit do you see? ___________
4.
Choose any number. With that number as the centre of a 3 x 3 square -
- multiply your number by 2
answer ____
- add the number above and below your number together
answer_____
- add the numbers on either side of your number together
answer ____
- add the numbers in the upper left and lower right together
answer ____
- add the numbers in the lower left and upper right together
answer ____
What do you notice about all of these answers? _______________________________
5.
Look at any 4 x 4 square. Add the diagonals.
answer ____
answer ____
What do you notice about the answers?
___________________________________
6.
Look at any 4 x 4 square. Add up all the diagonals?
answer _____
Add up the four numbers in the centre of the square?
answer _____
What do you notice about the numbers? _____________________________________
7.
Look at any 5 x 5 square. Add up the diagonals.
answer _____
Add up the 8 numbers in the centre of the square that make a ‘donut’ (that is - don't add
the centre number - leave a hole in the centre)?
answer _____
Multiply the very centre number by 3.
answer _____
What do you notice about the numbers? _____________________________________
8.
Look at all the columns. Choose any number. To move from that number to the number
directly below it, what number do you have to add?
answer _____
Choose another number and try it again?
answer _____
What do you notice? __________________________________________________
9.
Look at the diagonals. Choose any number. To move from that number to the number
below and to the right of your number, what do you have to add? answer _____
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