1000:2+400(300:2)=? 2000-1000(20•90+3)=? 100-10•(20•5)=?

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вопрос Следующий
вопрос

To solve these equations, we can follow the order of operations (PEMDAS/BODMAS):

1) 1000:2 + 400(300:2)
First, we calculate 1000 divided by 2, which equals 500.
Next, we calculate 300 divided by 2, which equals 150.
Then, we multiply 400 by 150, which equals 60000.
Finally, we add 500 to 60000 which equals 60500.

Therefore, 1000:2 + 400(300:2) = 60500.

2) 2000 - 1000(20•90+3)
First, we calculate the expression inside the parentheses:
20 * 90 = 1800
1800 + 3 = 1803

Next, we multiply 1000 by 1803, which equals 1803000.
Finally, we subtract 1803000 from 2000 which equals -1801000.

Therefore, 2000 - 1000(20•90+3) = -1801000.

3) 100 - 10•(20•5)
First, we calculate 20 multiplied by 5 which equals 100.
Next, we multiply 10 by 100, which equals 1000.
Finally, we subtract 1000 from 100 which equals -900.

Therefore, 100 - 10•(20•5) = -900.