问题
解答题
计算: (1)
(2)
(3)
|
答案
(1)原式=4
-(4+42
+2)2
=4
-4-42
-22
=-6;
(2)原式=
÷5 3
×7 3 7 5
=
×5 3
×3 7 7 5
=1;
(3)原式=
+4×3
-2 4
+13
=
+3
-2
+13
=
+1.2
计算: (1)
(2)
(3)
|
(1)原式=4
-(4+42
+2)2
=4
-4-42
-22
=-6;
(2)原式=
÷5 3
×7 3 7 5
=
×5 3
×3 7 7 5
=1;
(3)原式=
+4×3
-2 4
+13
=
+3
-2
+13
=
+1.2