问题
解答题
直接写计算结果 12.5×
9
2
7800×8÷36×108÷26=
1
|
答案
(1)12.5×
×0.56=1;1 7
(2)9
-35 7
+24 9
-84 9
,3 7
=(9
-85 7
)-(33 7
-24 9
),4 9
=1
-1,2 7
=
;2 7
(3)2
-(5 7
-3 5
),2 7
=2
-5 7
+3 5
,2 7
=27+
-2 7
,3 5
=3-
,3 5
=2
;2 5
(4)7800×8÷36×108÷26,
=7800×8×
×108×1 36
,1 26
=7200;
(5)
+1 6
+1 12
+1 20
,1 30
=
-1 2
+1 3
-1 3
+1 4
-1 4
+1 5
-1 5
,1 6
=
-1 2
,1 6
=
;1 3
(6)1
+21 9
+31 90
,1 900
=(1+2+3)+(
+1 9
+1 90
),1 900
=6+
,37 300
=6
.37 300