题目内容
①﹣8﹣7﹣(﹣10)
②﹣10+8÷(﹣2)2﹣(﹣4)×(﹣3)
③(
﹣
﹣
)×(﹣48)
④(﹣99
)×5.
②﹣10+8÷(﹣2)2﹣(﹣4)×(﹣3)
③(
④(﹣99
解:①原式=﹣8﹣7+10
=﹣15+10
=﹣5;
(2)原式=﹣10+8×
﹣12
=﹣10+2﹣12
=﹣20;
(3)原式=
×(﹣48)﹣
×(﹣48)﹣
×(﹣48)
=﹣36+8+4
=﹣24;
(4)原式=(﹣100+
)×5
=﹣100×5+
×5
=﹣20+
=﹣19
.
=﹣15+10
=﹣5;
(2)原式=﹣10+8×
=﹣10+2﹣12
=﹣20;
(3)原式=
=﹣36+8+4
=﹣24;
(4)原式=(﹣100+
=﹣100×5+
=﹣20+
=﹣19
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