问题
解答题
|
答案
60×(
+2 5
-3 4
),1 2
=60×
+60×2 5
-60×3 4
,1 2
=24+45-30,
=39;
(
+24 19
)×16 17
+1 8
,15 17
=
×24 19
+1 8
×16 17
+1 8
,15 17
=
+3 19
+2 17
,15 17
=
+1,3 19
=1
;3 19
1-[
+(1 6
-3 4
)],7 12
=1-(
+2 12
-9 12
),7 12
=1-
,1 3
=
;2 3
×5 8
+11 10
÷3 8
,10 11
=
×5 8
+11 10
×3 8
,11 10
=(
+5 8
)×3 8
,11 10
=1
.1 10