题目内容
计算:
(1)7+(﹣4)﹣3;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)7+(﹣4)﹣3;
(2)
(3)
(4)
(5)
(6)
解:(1)原式=7﹣4﹣3=0;
(2)1﹣
+
﹣
+
=1﹣1+2
=2;
(3)原式=﹣3×(﹣
)×
=
;
(4)原式=﹣24×(﹣
)+(﹣24)×
﹣(﹣24)×
=12﹣18+8
=2;
(5)原式=(﹣3
)×(3﹣4+1)
=﹣3
×0
=0;
(6)原式=﹣1÷25×(﹣
)+0.2
=
+
=
.
(2)1﹣
=1﹣1+2
=2;
(3)原式=﹣3×(﹣
=
(4)原式=﹣24×(﹣
=12﹣18+8
=2;
(5)原式=(﹣3
=﹣3
=0;
(6)原式=﹣1÷25×(﹣
=
=
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