问题
解答题
脱式计算.(能简算的要简算)
|
答案
(1)
+9 10
-13 15 3 5
=
+27 30
-26 30 18 30
=
;7 6
(2)
-2 3
+1 2 11 12
=
-8 12
+6 12 11 12
=
;13 12
(3)
-8 17
+7 23 9 17
=
+8 17
-9 17 7 23
=1-7 23
=
.16 23
脱式计算.(能简算的要简算)
|
(1)
+9 10
-13 15 3 5
=
+27 30
-26 30 18 30
=
;7 6
(2)
-2 3
+1 2 11 12
=
-8 12
+6 12 11 12
=
;13 12
(3)
-8 17
+7 23 9 17
=
+8 17
-9 17 7 23
=1-7 23
=
.16 23