问题
解答题
91×
67×
|
答案
(1)
×17-12×6 11 3 11
=
×17-6×6 11 6 11
=
×(17-6)6 11
=
×116 11
=6;
(2)91×
+9÷13-1÷13×1001 13
=94×
+9×1 13
-1 13
×1001 13
=(94+9-100)×1 13
=3×1 13
=
;3 13
(3)67×
+65 66 1 66
=(66+1)×
+65 66 1 66
=66×
+(65 66
+65 66
)1 66
=65+1
=66;
(4)
+3 4
+3 28
+3 70
+3 130 3 208
=1-
+1 4
-1 4
+1 7
-1 7
+1 10
-1 10
+1 13
-1 13 1 16
=1-1 16
=
.15 16