题目内容
计算:(1)﹣3+5.3+7﹣5.3
(2)
(3)
(4)
(2)
(3)
(4)
(1)﹣3+5.3+7﹣5.3
=(﹣3+7)+(5.3﹣5.3)
=4
(2)
=﹣3×(
×4
=16
(3)
=
×(﹣42)
×(﹣42)+
?(﹣42)
=(﹣14)﹣(﹣10)+(﹣9)
=﹣13
(4)
=﹣1﹣5+2×
=﹣5
=(﹣3+7)+(5.3﹣5.3)
=4
(2)
=﹣3×(
=16
(3)
=
=(﹣14)﹣(﹣10)+(﹣9)
=﹣13
(4)
=﹣1﹣5+2×
=﹣5
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