问题
解答题
计算(1)(-1)2×5+(-1)×52-14×5+(-1+5)2 (2)(-32)×(-
|
答案
(1)原式=1×5-25-5+42,
=5-25-5+16,
=-9;
(2)原式=1-(
×24+1 2
×24-2 3
×24-3 4
×24),11 12
=1-(12+16-18-22),
=1-12-16+18+22,
=13.
计算(1)(-1)2×5+(-1)×52-14×5+(-1+5)2 (2)(-32)×(-
|
(1)原式=1×5-25-5+42,
=5-25-5+16,
=-9;
(2)原式=1-(
×24+1 2
×24-2 3
×24-3 4
×24),11 12
=1-(12+16-18-22),
=1-12-16+18+22,
=13.