Order in Addition

The video tutorial introduces a scenario with a train where Sam and Sela count children in different compartments, demonstrating addition. It explores how changing the order of numbers in addition sentences does not affect the sum. The tutorial further illustrates this concept using cubes and a number card, reinforcing the idea that numbers can be added in any order to achieve the same result.

How many children did Sam count in the train compartments?

• 6 in total

• 3 in one and 5 in the other

• 5 in one and 3 in the other

• 4 in each compartment

What is the total number of cubes Sam has?

• 9

• 6

• 7

• 8

If Sela has 1 red cube, how many blue cubes does she have?

• 7

• 8

• 5

• 6

What number did Sela and Sam need to form using cubes from their bags?

• 8

• 5

• 6

• 7

What is the sum of 1 red, 2 blue, and 3 green cubes?

• 7

• 6

• 5

• 8

What is the sum of 3 red, 2 blue, and 1 green cubes?

• 8

• 5

• 6

• 7

What is the key observation about the addition sentences?

• The order of numbers does not change the sum

• The sum is always zero

• The sum is always different

• The order of numbers changes the sum