Question

18×13-15×13+21×17-18×17+17×15-15×14​

Answer 1

Ответ:

135

Пошаговое объяснение:

13×(18-15)+17×(21-18)+15×(17-14)=13×3+17×3+15×3=3×(13+17+15)=3×45=135

Answer 2

Ответ:135

Пошаговое объяснение:18×13-15×13+21×17-18×17+17×15-15×14=135

Answer 3

To solve this expression, you should follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders (i.e., powers and square roots, etc.), Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right). In this case, we have multiplication and subtraction, so we'll perform those operations from left to right:

1. Calculate 18 × 13 = 234
2. Calculate 15 × 13 = 195
3. Calculate 21 × 17 = 357
4. Calculate 18 × 17 = 306
5. Calculate 17 × 15 = 255
6. Calculate 15 × 14 = 210

Now, you can substitute these values into the original expression:

234 - 195 + 357 - 306 + 255 - 210

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

(234 - 195) + (357 - 306) + (255 - 210)

1. 234 - 195 = 39
2. 357 - 306 = 51
3. 255 - 210 = 45

Now, add these results together:

39 + 51 + 45 = 135

So, the final answer is 135.