问题
解答题
列式计算 (1)从1里减去
(2)从
|
答案
解;(1)1-(
+1 5
),1 6
=1-
,11 30
=
;19 30
答:差是
.19 30
(2)
-7 10
+2 15
,1 2
=
-21 30
+4 30
,15 30
=
.16 15
答;和是
.16 15
列式计算 (1)从1里减去
(2)从
|
解;(1)1-(
+1 5
),1 6
=1-
,11 30
=
;19 30
答:差是
.19 30
(2)
-7 10
+2 15
,1 2
=
-21 30
+4 30
,15 30
=
.16 15
答;和是
.16 15