-1+（-2）×（-3）-10÷（-5）

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Worked solution

1. 先进行有理数的乘法和除法运算

原式中的乘法和除法部分分别为：
(−2)×(−3)=6(-2) \times (-3) = 6，
10÷(−5)=−210 \div (-5) = -2。

将其代入原式得：
−1+6−(−2)-1 + 6 - (-2)

2. 进行有理数的加减法混合运算得出最终结果

化简双重符号并按从左到右的顺序计算：
−1+6−(−2)=−1+6+2=5+2=7-1 + 6 - (-2) = -1 + 6 + 2 = 5 + 2 = 7

Answer

7

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