问题
解答题
计算 (1)2
(2)(
(3)
|
答案
(1)2
-73
+412 27
=2
-143
+123 3
=0;
(2)(
+48
)+(20
-12
)5
=4
+23
+25
-3 5
=6
+3
;5
(3)
-948
+31 3 12
=4
-33
+63 3
=7
.3
计算 (1)2
(2)(
(3)
|
(1)2
-73
+412 27
=2
-143
+123 3
=0;
(2)(
+48
)+(20
-12
)5
=4
+23
+25
-3 5
=6
+3
;5
(3)
-948
+31 3 12
=4
-33
+63 3
=7
.3