20000+1000-120-10+120+20+40

解答

20000 + 1000 - 120 - 10 + 120 + 20 + 40

21050

求解步骤

20000 + 1000 - 120 - 10 + 120 + 20 + 40

遵循 PEMDAS 运算顺序

加减（左右）

20000 + 1000 = 21000

= 21000 - 120 - 10 + 120 + 20 + 40

21000 - 120 = 20880

= 20880 - 10 + 120 + 20 + 40

20880 - 10 = 20870

= 20870 + 120 + 20 + 40

20870 + 120 = 20990

= 20990 + 20 + 40

20990 + 20 = 21010

= 21010 + 40

21010 + 40 = 21050

= 21050

- 5 (2) + (- 5) (\frac{1}{16})

- 2 \times + 4 - 1

\frac{3}{4} [\frac{1}{4} \div (- \frac{1}{2})]

7 (2)^{3} - 3 (2)^{2} - (2) + 10

7 (5 + (- 4) - (- 1))