问题
解答题
脱式计算,怎样简便就怎样算 ①(
②
③
④102×
⑤
⑥
|
答案
①(
-1 2
)÷1 4
+1 3
,1 6
=
×3+1 4
,1 6
=
+9 12
,2 12
=
;11 12
②
÷3 4
-9 10
×5 14
,7 15
=
×3 4
-10 9
×5 14
,7 15
=
-5 6
,1 6
=
;2 3
③
×[8 9
-(3 4
-7 16
)],1 4
=
×[8 9
-3 4
],3 16
=
×8 9
,9 16
=
;1 2
④102×
,98 101
=(101+1)×
,98 101
=101×
+1×98 101
,98 101
=98+
,98 101
=98
;98 101
⑤
-4 5
+5 9
-1 5
,4 9
=(
+4 5
)-(1 5
+5 9
),4 9
=1-1,
=0;
⑥
÷7+8 13
×1 7
,5 13
=
×8 13
+1 7
×1 7
,5 13
=
×(1 7
+5 13
),8 13
=
×1,1 7
=
.1 7