Question

A) (10 + 15) · 290 - (10 + 15) · 26) 90 - 40(90 - 40): 2(90 - 40): 2 - 10​

Answer 1

A) (10+15) • 2 = 25•2 =50
90 - (10+15) • 2 = 90-25•2=90-50=40
90-40=50
(90-40):2=50:2=25
(90-40):2-10=50:2-10=25-10=15
А вообще, такие примеры нужно самим или на калькуляторе считать. Это максимум 3-мой класс.

Answer 2

1) 50
2)40
3) 50
4) 25
5) 15

Answer 3

Let's simplify the given expression step by step:

1. (10 + 15) · 290 - (10 + 15) · 26 = 25 · 290 - 25 · 26 = 7250 - 650 = 6600

2. 90 - 40 = 50

3. 2(90 - 40) = 2 · 50 = 100

4. (90 - 40): 2 = 50 ÷ 2 = 25

5. 2(90 - 40): 2 - 10 = 25 - 10 = 15

Now, let's put it all together:

(10 + 15) · 290 - (10 + 15) · 26) 90 - 40(90 - 40): 2(90 - 40): 2 - 10 = 6600 - 40(90 - 40): 2(90 - 40): 2 - 10 (since 6600 is the result from step 1) = 6600 - 40(50): 2(50): 2 - 10 (since 90 - 40 is 50, according to step 2) = 6600 - 40(25): 2(50): 2 - 10 (since (90 - 40): 2 is 25, according to step 4) = 6600 - 40(25): 25: 2 - 10 (since 50: 2 is 25, according to step 3) = 6600 - 1000: 25 - 10 (since 40(25) is 1000) = 6600 - 40 - 10 (since 1000: 25 is 40) = 6560 - 10 = 6550

So, the final result of the expression is 6550.