Question

Определи порядок действий в выражениях и вычисли их значения;117+(45-40); ( 35-20)+(3+67) ; 5-(35-31)+307

Answer 1

А)
1) 45-40=5
2) 117+5=122

б) 
1) 35-20=15
2) 3+67=70
3) 15+70=85

в) 
1) 35-31=4
2) 5-4=1
3) 1+307=308

Answer 2

117+(45-40)= 122
1)45-40=5
2)117+5=122
(35-20)+(3+67)= 85
1) 35-20=15
2)3+67=70
3) 15+70=85 
5-(35-31)+307=308
1)35-31=4
2)5-4=1
3)1+307=308

Answer 3

Order of Operations and Calculations

To determine the order of operations in the given expressions and calculate their values, we can follow the standard mathematical rules.

1. Expression 1: 117 - (45-40) - First, we need to perform the operation inside the parentheses. - 45 - 40 = 5 - Then, we subtract the result from 117. - 117 - 5 = 112 - Therefore, the value of the expression is 112.

2. Expression 2: (35-20) + (3+67) - Again, we start by solving the operations inside the parentheses. - 35 - 20 = 15 - 3 + 67 = 70 - Finally, we add the results together. - 15 + 70 = 85 - Hence, the value of the expression is 85.

3. Expression 3: 5 - (35-31) + 307 - Similar to the previous expressions, we begin by evaluating the operation inside the parentheses. - 35 - 31 = 4 - Then, we subtract the result from 5. - 5 - 4 = 1 - Finally, we add 1 to 307. - 1 + 307 = 308 - Therefore, the value of the expression is 308.

These calculations follow the standard order of operations (parentheses, exponents, multiplication and division from left to right, addition and subtraction from left to right) to determine the values of the given expressions.