题目内容
计算:(1)(﹣9)+4+(﹣5)+8;
(2)
(3)(
﹣
+
﹣
)×(﹣36)
(4)(﹣47.65)×2
+(﹣37.15)×(﹣2
)+10.5×(﹣7
).
(2)
(3)(
(4)(﹣47.65)×2
解:(1)原式=﹣9+4﹣5+8
=﹣2;
(2)原式=﹣1﹣
×[2﹣9]
=﹣1﹣(﹣
)
=﹣1+
=
;
(3)原式=﹣(28﹣30+27﹣14)
=﹣11;
(4)原式=(﹣47.65+37.15)×2
+10.5×(﹣7
)
=﹣10.5×2
+10.5×(﹣7
)
=﹣10.5×2
﹣10.5×7
=﹣10.5×(
)
=﹣10.5×10
=﹣105.
=﹣2;
(2)原式=﹣1﹣
=﹣1﹣(﹣
=﹣1+
=
(3)原式=﹣(28﹣30+27﹣14)
=﹣11;
(4)原式=(﹣47.65+37.15)×2
=﹣10.5×2
=﹣10.5×2
=﹣10.5×(
=﹣10.5×10
=﹣105.
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