问题
解答题
|
答案
①
+5 9
×4 9
÷9 20
,6 5
=
+5 9
×1 5
,5 6
=
+5 9
,1 6
=
+10 18
,3 18
=
;13 18
②
+11 13
-(7 12
-11 13
),5 12
=
-11 13
+11 13
+7 12
,5 12
=1;
③(1-25%)×101-
,3 4
=75%×101-75%,
=(101-1)×75%,
=100×75%,
=75;
④197×
+1 98
,1 98
=(196+1)×
+1 98
,1 98
=196×
+1×1 98
+1 98
,1 98
=2+
×2,1 98
=2
;1 49
⑤
÷[2 3
×(3 4
-17 18
)],8 9
=
÷[2 3
×(3 4
-17 18
)],16 18
=
÷[2 3
×3 4
],1 18
=
×24,2 3
=16;
⑥
×2001+1 2007
+5 2007
,1 2007
=
+2001 2007
+5 2007
,1 2007
=1;
⑦3
:x=11 2
:(1.6×5),3 4
1
x=(1.6×5)×33 4
,1 2
1
x÷13 4
=8×33 4
÷11 2
,3 4
x=16.