问题
解答题
计算:(1)(-0.25)×(-7.99)×400; (2)-72+2×(-3)2+(-6)÷(-
|
答案
(1)原式=
×7.99×4001 4
=100×7.99
=799.
(2)原式=-49+2×9-6÷1 9
=-49+18-54
=-85.
计算:(1)(-0.25)×(-7.99)×400; (2)-72+2×(-3)2+(-6)÷(-
|
(1)原式=
×7.99×4001 4
=100×7.99
=799.
(2)原式=-49+2×9-6÷1 9
=-49+18-54
=-85.