Mrs. Zamir has [tex]\fbox{\bf\$8.8}[/tex] left to buy eraser.
Further explanation :
Multiplication is a mathematical operation such that two real numbers are performed in such a way that they derive a third number called product.
For example:
There are two numbers [tex]4{\text{ and 5}}[/tex] then multiply both the numbers as,
[tex]4\times5=20[/tex]
Therefore, 20 is the product of 4 and 5.
It is given that Mrs. Zamir wants to buy 8 protractors and some erasers for her classroom.
She has total [tex]\$30[/tex].
If the price of the protractor is [tex]\$2.65[/tex] each.
Therefore, she spends total amount of money on protractor can be calculated by multiplying 8 protractors by 2.65 as,
[tex]\begin{aligned}n&=8\times2.65\\&=21.2\\\end{aligned}[/tex]
Thus, she spends [tex]\$21.2[/tex] on protractors.
Now, she has total [tex]\$30[/tex] and [tex]\$21.2[/tex] she spends on protractors.
Therefore, she left with the amount [tex]r[/tex] as,
[tex]\begin{aligned}r&=30-21.2\\&=8.8\\\end{aligned}[/tex]
Therefore, she has [tex]\fbox{\bf\$8.8}[/tex] amount left for eraser.
Learn more :
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Answer details:
Grade: Junior school
Subject: Mathematics
Chapter: Multiplication and division
Keywords: Mrs. Zamir, protractors, erasers, cost, multiplication, division, addition, subtraction, real numbers, decimal numbers.
Mrs Zamir has $8.80
This is a practical multiplication and subtraction question
Further Explanation
Multiplication is a mathematical process where two or more numbers are multiplied to give a final number which is also known as a product. For example, a product, 100 is derived from two or three numbers i.e. 25 x 4 = 100; 5 x 5 x 4 = 100.
Subtraction is a mathematical operation where two or more numbers are calculated in a reducing from to give a final number. For example, 50 – 40 = 10; 50 – 20 – 20 = 10.
Solving the given question:
Mrs Zamir has $30.00, Let Total amount = T
Therefore, T = 30
She needs to buy 8 protractors and some erasers for her classroom.
If protractors cost $2.65, then
Total cost of protractors will be multiplying the protractors cost by the number of protractors needed which is 8
Let the Total cost of protractors =Y
Therefore Y = $2.65 X 8
Y = 21.2
To get the remainder of what Mrs Zamir has left, subtract Y from T i.e. (T – Y)
Let the remainder = R
R = T – Y
R = 30 – 21.2
R = 8.80
Therefore, Mrs Zamir will have $8.80 left to buy erasers
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