问题
解答题
|
答案
(1)238×5-623
=1190-623
=567;
(2)103×6+68
=618+68
=686;
(3)
+2 7 1 7
=2+1 7
=
;3 7
(4)1-
+2 5 1 5
=
+3 5 1 5
=
.4 5
|
(1)238×5-623
=1190-623
=567;
(2)103×6+68
=618+68
=686;
(3)
+2 7 1 7
=2+1 7
=
;3 7
(4)1-
+2 5 1 5
=
+3 5 1 5
=
.4 5