How could concrete materials be used to explain to young children a number being divisible by 5 or not being divisible by 5?

9514 1404 393

  have the child arrange the tokens in groups of 5. none left = divisible by 5

Step-by-step explanation:

A number is divisible by 5 if there is no remainder when it is divided into 5 parts. Using "manipulatives," this can be shown a couple of ways:

  1) deal the tokens to 5 piles (each pile will have the same number)

  2) group the tokens into groups of 5 (no tokens will be left over)

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²