5× 9+(10\div 5)-2+6

解答

5 \times 9 + (10 \div 5) - 2 + 6

51

求解步骤

5 \times 9 + (10 \div 5) - 2 + 6

遵循 PEMDAS 运算顺序

计算括号内的值

(10 \div 5) : 2

10 \div 5

10 \div 5 = 2

= 2

= 5 \times 9 + 2 - 2 + 6

乘除（左右）

5 \times 9 : 45

5 \times 9

5 \times 9 = 45

= 45

= 45 + 2 - 2 + 6

加减（左右）

45 + 2 - 2 + 6 : 51

45 + 2 - 2 + 6

45 + 2 = 47

= 47 - 2 + 6

47 - 2 = 45

= 45 + 6

45 + 6 = 51

= 51

= 51

9 \div 3 - [(28 - 10) - (9 - 2)]

45 \cdot 9^{2}

2 \times (- \frac{5}{6}) - \frac{4}{7}

[(78 \div 13)^{3} - 8] 4 + 4

(10 - [7 - (5 - 2) + 1] - 4)