The weight of Callie's backpack is 7½ pounds which is calculated by multiplication of the number of times the bag is heavier with the weight of the bag.
Multiplication or product of two constants is defined as the number of times a particular constant is added . If we want to multiply a and b then their product is equal to b times a added.
a+a+a+a....... b times=ab
The multiplication is one of the four basic arithmetic operations that are used in mathematics and everyday lives.
Given the weight of Callie's bag is 2 ½ times the weight of Carl's backpack.
Therefore to calculate the the weight of Callie's backpack we multiply the weight of Carl's backpack with 2 ½.
Weight of Carl's backpack=3 pounds
Therefore weight of Callie's backpack= 2 ½×3 pounds= 7½ pounds
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