Page 47 - PlayFacto_S4

Material: 1 Number chip set (1-25)

Let’s find a prime number or square number using addition and subtraction.

Hund. 1. Shuffle one number chip set from 1 to 25 face down in the middle of the table.
Board 2. Each player selects one number chip and flips them at the same time.

3. Two players add or subtract two numbers on the selected chips to make it as a prime
number or a square number.
4. The player who makes the appropriate number says “Facto”. Then says if it is a prime
number or square number.
5. The player who says correctly, takes the two chips or places one selected chip aside
if he/she cannot say or say incorrectly. Then the other player takes a turn.
6. If the other player also cannot make a prime number or square number, each player
selects a chip again, then use two from four numbers to make a number and says if it
is a prime number or a square number.
7. Play until there is no chip to select. The player who collects more chips wins.

“Facto!” You take those
21-10 = 11, two chips.
it is a prime number.

44 Workbook S-4