神机妙算细又巧.11.3+99×(12.6-1.3
神机妙算细又巧.11.3+99×(12.6-1.3)13÷[56-(12-16)](1.25+1.25+1.25+1.25)×2.5÷1812×(512+725)×25....
神机妙算细又巧.11.3+99×(12.6-1.3)13÷[56-(12-16)](1.25+1.25+1.25+1.25)×2.5÷1812×(512+725)×25.
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(1)11.3+99×(12.6-1.3),
=11.3+99×11.3,
=(99+1)×11.3,
=100×11.3,
=1130;
(2)
÷[
-(
-
)],
=
÷[
+
-
],
=
÷[1-
],
=
÷
,
=
×2,
=
;
(3)(1.25+1.25+1.25+1.25)×2.5÷
,
=1.25×4×2.5×8,
=1.25×8×(4×2.5),
=10×10,
=100;
(4)12×(
+
)×25,
=12×
×25+12×
×25,
=125+84,
=209.
=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 |
3 |
1 |
2 |
=
1 |
3 |
1 |
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 |
7 |
25 |
=12×
5 |
12 |
7 |
25 |
=125+84,
=209.
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