问题
解答题
|
答案
(1)99×
,97 98
=(98+1)×
,97 98
=98×
+1×97 98
,97 98
=97+
,97 98
=97
;97 98
(2)24×(
+7 8
-3 2
),3 4
=24×
+24×7 8
-24×3 2
,3 4
=21+36-18,
=39;
(3)
×1 6
÷(2 3
-4 5
),8 15
=
÷1 9
,4 15
=
×1 9
,15 4
=
;5 12
(4)
÷4 9
-(4 5
-1 5
),1 3
=
×4 9
-5 4
+1 5
,1 3
=
+5 9
-1 3
,1 5
=
;31 45
(5)1-(
+1 4
)÷3 8
,1 4
=1-
×4,5 8
=1-
,5 2
=-
;3 2
(6)
×35 8
+5 7
÷2 7
,8 35
=
×35 8
+5 7
×2 7
,35 8
=
×(35 8
+5 7
),2 7
=
×1,35 8
=
.35 8