问题
解答题
简便运算. (1)(-8)×(+3.67)×(-0.125); (2)(
(3)(-4)×(+25
(4)(-6)×45+(-6)×55. |
答案
(1)原式=(-8)×(-0.125)×3.67
=3.67;
(2)原式=-36+63+12
=39;
(3)原式=-4×(25+
)3 4
=-100-3
=-103;
(4)原式=-6×(45+55)
=-6×100
=-600.
简便运算. (1)(-8)×(+3.67)×(-0.125); (2)(
(3)(-4)×(+25
(4)(-6)×45+(-6)×55. |
(1)原式=(-8)×(-0.125)×3.67
=3.67;
(2)原式=-36+63+12
=39;
(3)原式=-4×(25+
)3 4
=-100-3
=-103;
(4)原式=-6×(45+55)
=-6×100
=-600.