问题
解答题
|
答案
(1)
+4 5
+11 15 3 10
=
+48 60
+44 60 18 60
=
;11 6
(2)6-(
-3 4
)3 5
=6-3 20
=5
;17 20
(3)
-(4 3
+2 5
)3 10
=
-4 3 7 10
=
-40 30 21 30
=
;19 30
(4)
+(5 9
-3 4
)1 2
=
+5 9 1 4
=
+20 36 9 36
=
;29 30
(5)
+2 3
+7 10
+1 3 3 10
=(
+2 3
)+(1 3
+7 10
)3 10
=1+1
=2;
(6)1-(
-1 6
)+1 7 1 6
=1-
+1 6
+1 7 1 6
=(1+
)+(1 7
-1 6
)1 6
=1
+01 7
=1
.1 7