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简介:
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.