Divisibility Rules for Eight

In this video, Mr. J explains the divisibility rule for eight, which states that if the number formed by the last three digits of a number is divisible by eight, then the entire number is divisible by eight. The video goes through four examples to demonstrate this rule: 342,024, 184,778, 9,125,048, and 7,091,544. Each example is analyzed to determine if the last three digits are divisible by eight, confirming whether the whole number is divisible by eight. The video concludes with a summary of the rule.

What does it mean for a number to be divisible by another number?

• It can be divided with a remainder.

• It can be divided without a remainder.

• It can be divided by any number.

• It cannot be divided at all.

Tags

CCSS.4.OA.B.4

According to the divisibility rule for eight, which part of the number should be checked?

• The middle three digits

• The last three digits

• The entire number

• The first three digits

Tags

CCSS.3.OA.B.6

In the first example, what is the result of dividing 24 by 8?

• 4

• 5

• 3

• 2

Tags

CCSS.5.NBT.A.2

For the number 184,778, what is the remainder when 778 is divided by 8?

• 2

• 0

• 1

• 3

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

Why is the number 184,778 not divisible by 8?

• Because 778 is not divisible by 8

• Because 184 is not divisible by 8

• Because 778 is divisible by 8

• Because 184 is divisible by 8

Tags

CCSS.3.OA.B.6

In the third example, what is the result of dividing 48 by 8?

• 8

• 7

• 6

• 5

Tags

CCSS.5.NBT.A.1

What is the significance of the number 48 in the third example?

• It is the middle three digits of the number.

• It is the last three digits of the number.

• It is the first three digits of the number.

• It is the entire number.

Tags

CCSS.4.NBT.B.6

In the fourth example, what is the result of dividing 544 by 8?

• 69

• 67

• 70

• 68

Tags

CCSS.3.OA.D.9

Why is the number 7,091,544 divisible by 8?

• Because 544 is not divisible by 8

• Because 7,091 is not divisible by 8

• Because 7,091 is divisible by 8

• Because 544 is divisible by 8

What is the main takeaway from the video about the divisibility rule for eight?

• Check the entire number.

• Check the first three digits of a number.

• Check the last three digits of a number.

• Check the middle three digits of a number.