问题
解答题
列式计算. (1)甲数是
(2)从
(3)
|
答案
(1)
+(2 3
-2 3
)1 4
=
+2 3 5 12
=
;13 12
答:两数之和是
.13 12
(2)
-(3 5
+1 10
)3 8
=
-3 5 19 40
=
;1 8
答:差是
.1 8
(3)
-(3 8
-2 3
)1 2
=
-3 8 1 6
=
;5 24
答:少
.5 24