Page 49 - PlayFacto_B7
P. 49
Making a closer number by adding
or subtracting
Let’s make the closest number to the target number by using number
chips and operation chips.
Materials: Create Expression activity board,
1 Number chip set (1-9), 1 Operation chip set ( , )
1 Prepare one Create Expression activity board, one number chip set
from 1 to 9, and one operation chip set (+, -).
2 Make the number closest to the number given in the by using four
given number chips and operation chips + or -.
Example
Target number: 70
I made a number 63
using four number chips
2, 3, 6, and 8. The difference
between 63 and 70 is 7.
How can I make it
closer?
63
46 Workbook B-7
or subtracting
Let’s make the closest number to the target number by using number
chips and operation chips.
Materials: Create Expression activity board,
1 Number chip set (1-9), 1 Operation chip set ( , )
1 Prepare one Create Expression activity board, one number chip set
from 1 to 9, and one operation chip set (+, -).
2 Make the number closest to the number given in the by using four
given number chips and operation chips + or -.
Example
Target number: 70
I made a number 63
using four number chips
2, 3, 6, and 8. The difference
between 63 and 70 is 7.
How can I make it
closer?
63
46 Workbook B-7