问题
解答题
神机妙算细又巧. 11.3+99×(12.6-1.3)
(1.25+1.25+1.25+1.25)×2.5÷
12×(
|
答案
(1)11.3+99×(12.6-1.3),
=11.3+99×11.3,
=(99+1)×11.3,
=100×11.3,
=1130;
(2)
÷[1 3
-(5 6
-1 2
)],1 6
=
÷[1 3
+5 6
-1 6
],1 2
=
÷[1-1 3
],1 2
=
÷1 3
,1 2
=
×2,1 3
=
;2 3
(3)(1.25+1.25+1.25+1.25)×2.5÷
,1 8
=1.25×4×2.5×8,
=1.25×8×(4×2.5),
=10×10,
=100;
(4)12×(
+5 12
)×25,7 25
=12×
×25+12×5 12
×25,7 25
=125+84,
=209.