
计算:(1)(?36)×(54?56?712)(2)4.7×3.6+5.4×12+5.3×3.6+4.6×12(3)(?5)3×34?53×(?12)2?(?5)2
计算:(1)(?36)×(54?56?712)(2)4.7×3.6+5.4×12+5.3×3.6+4.6×12(3)(?5)3×34?53×(?12)2?(?5)2×(?...
计算:(1)(?36)×(54?56?712)(2)4.7×3.6+5.4×12+5.3×3.6+4.6×12(3)(?5)3×34?53×(?12)2?(?5)2×(?52).(4)(2x2-5xy)-3(x2-y2)+x2-3y2-2(2xy+1)
展开
1个回答
展开全部
(1)原式=-45+30+21
=6;
(2)原式=3.6×(4.7+5.3)+
×(5.4+4.6)
=36+5
=41;
(3)原式=-125×
-125×
+125×
=125×(-
)
=-62
;
(4)原式=2x2-5xy-3x2+3y2+x2-3y2-4xy-2
=-9xy-2.
=6;
(2)原式=3.6×(4.7+5.3)+
1 |
2 |
=36+5
=41;
(3)原式=-125×
3 |
4 |
1 |
4 |
1 |
2 |
=125×(-
1 |
2 |
=-62
1 |
2 |
(4)原式=2x2-5xy-3x2+3y2+x2-3y2-4xy-2
=-9xy-2.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询