Question

7×7 8×7 7×9 6×7 + - 5×3 6×4 7×0 9×2 составь выражения.Вычисли их значения.

Answer 1

Ответ:

............. ...........................

Answer 2

To evaluate the expressions, we need to perform the arithmetic operations (multiplication and addition) in the correct order. The order of operations is typically remembered using the acronym PEMDAS: Parentheses, Exponents, Multiplication, and Division (from left to right), and Addition and Subtraction (from left to right). However, there are no parentheses or exponents in the given expressions, so we'll proceed with multiplication and addition from left to right.

The given expressions are:

1. 7×7
2. 8×7
3. 7×9
4. 6×7
5. 5×3
6. 6×4
7. 7×0
8. 9×2

Let's evaluate them step by step:

1. 7×7 = 49
2. 8×7 = 56
3. 7×9 = 63
4. 6×7 = 42
5. 5×3 = 15
6. 6×4 = 24
7. 7×0 = 0
8. 9×2 = 18

Now, let's rearrange the expressions as provided:

6×7 + - 5×3 6×4 7×0 9×2

We need to clarify what the "-" stands for since it's not explicitly given. Assuming it represents subtraction, we can rewrite the expression as follows:

6×7 - 5×3 + 6×4 + 7×0 + 9×2

Next, we perform the multiplication first:

1. 6×7 = 42
2. 5×3 = 15
3. 6×4 = 24
4. 7×0 = 0
5. 9×2 = 18

Now, we have:

42 - 15 + 24 + 0 + 18

Now, we perform the addition and subtraction from left to right:

1. 42 - 15 = 27
2. 27 + 24 = 51
3. 51 + 0 = 51
4. 51 + 18 = 69

So, the final value of the expression "6×7 - 5×3 + 6×4 + 7×0 + 9×2" is 69.