Answer: 1. i do time4learning two
Step-by-step explanation:
answer
[15: (3 \times 5) + 4] \times 8
Step-by-step explanation:
First of all, let us have a look at the rule for solving brackets/parentheses/algebraic operations.
The rule states that the expression must be solved in the following order:
B - Brackets (Innermost parentheses first, then the enclosing brackets are solved)
O - Of (for example 10% of 20)
D - Divide operation
M - Multiplication operation
A - Addition operation
S - Subtraction operation
So, we need to add a set of parentheses i.e. () and a set of brackets i.e. [] in the expression:
15: 3 \times 5 + 4 \times 8 such that the result is 40.
Consider the expression: [15: (3 \times 5) + 4] \times 8
Let us try to solve the expression using the above rule:
[15: (3 \times 5) + 4] \times 8
First of all, the innermost () will be solved:
(3\times 5) = 15
Now, the expression becomes:
[15: 15 + 4] \times 8
Now, 15:15 will be solved as 1
[1+ 4] \times 8
Now, the outer [] will be solved:
5\times 8 = 40
Hence, the correct answer is:
[15: (3 \times 5) + 4] \times 8
