In a warehouse, boxes are stacked in columns with a maximum number of 10 boxes. In each box there are exactly 10 packages containing cardboard, and inside each package there are 10 cards. Considering that there are 100 columns of boxes, let's determine the total amount of cards in each box, column of boxes and in the warehouse.
The operation to be performed is the multiplication.
Number of cards in each box
There are 10 packages with 10 cards each, so: 10 x 10 = 100 cards in each box.
Number of cards in each column
There are 10 boxes in each column, if there are 100 cards in each box, we have:
10 x 100 = 1000 cards in each column.
Number of cards in deposit
There are 10 boxes in each column with 100 cards in each box, so we have 1000 cards in each column. We know it's 100 columns, so: 100 x 1000 = 100 000.
The maximum number of cards in the deposit is equal to 100,000 cards.
The multiplications performed can be performed using practical rules:
Multiplying by 10
When we multiply a number by 10, we just add a zero to the right of the number.
6 x 10 = 60
2 x 10 = 20
13 x 10 = 130
14 x 10 = 140
70 x 10 = 700
25 x 10 = 250
Multiplying by 100
When we multiply a number by 100, we just add two zeros to the right of the number.
2 x 100 = 200
30 x 100 = 3000
45 x 100 = 4,500
32 x 100 = 3 200
520 x 100 = 52 000
800 x 100 = 80 000
Multiplying by 1000
When we multiply a number by 1000, we just add three zeros to the right of the number.
1 x 1000 = 1000
54 x 1000 = 54 000
31 x 1000 = 31 000
250 x 1000 = 250 000
19 x 1000 = 19000
54 x 1000 = 54 000
by Mark Noah
Mathematical
Kids School Team
