2025秋七上数学有理数暑期专项训练 3﹣(+63)﹣(﹣41) =3+(﹣63)+41 =﹣19 (﹣1)2022×|1|﹣(0.5)÷(﹣) =1× + × 3 = + =3. 5+(﹣6)+3﹣(﹣4) =5+(﹣6)+3+4 =6 ÷(﹣)﹣ ×(﹣4)2 = ÷(﹣)﹣ ×16 = ÷ ﹣ = × ﹣ = - =﹣ (+3)+(﹣2)﹣(﹣5)﹣(+1) =3+(﹣2)+5+(﹣1) =5 (﹣2)2×2﹣(﹣36)÷4; =4×2+9 =8+9 =17 12+ +(﹣ )×(﹣8) =12+ +2 =14 ﹣12+|﹣3|×4﹣5÷(﹣)3. 原式=﹣1+3×4﹣5÷(﹣) =﹣1+12﹣5×(﹣8) =﹣1+12+40 =11+40 =51.