问题
解答题
神机妙算细又巧.(计算下面各题能简算的要简算)
|
答案
(1)
×21×5 7
,3 10
=
,5×21×3 7×10
=
;9 2
(2)
÷0.6×18 35
,2 3
=
×18 35
×10 6
,2 3
=
;4 7
(3)2-
÷6 13
-9 26
,2 3
=2-
-4 3
,2 3
=2-(
+4 3
),2 3
=2-2,
=0;
(4)
×[9 10
÷(5 9
-1 2
)],1 6
=
×[9 10
÷5 9
],2 6
=
×9 10
,15 9
=
;3 2
(5)(0.25+
)×(1.6÷1 3
),4 5
=
×2,3 4
=
; 3 2
(6)(
+3 17
)×17+22÷39,1 39
=
×17+3 17
×17+1 39
,22 39
=3+(
+17 39
),22 39
=3+1,
=4.