题目内容
计算,能简便算就简便算.
÷
×10
×
÷
2014×
×
×(2014×42×85)
×
-
÷15×13.
| 3 |
| 14 |
| 15 |
| 28 |
| 9 |
| 5 |
| 2 |
| 3 |
| 18 |
| 35 |
2014×
| 2012 |
| 2013 |
| 1 |
| 21 |
| 1 |
| 17 |
| 19 |
| 17 |
| 13 |
| 15 |
| 2 |
| 17 |
(1)
÷
×10
=
×10
=4;
(2)
×
÷
=
×
=
;
(3)2014×
=(2013+1)×
=2013×
+1×
=2012+
=2012
;
(4)
×
×(2014×42×85)
=(
×42)×(
×85)×2014
=2×5×2014
=10×2014
=20140;
(5)
×
-
÷15×13
=
×
-
×(
×13)
=
×
-
×
=(
-
)×
=1×
=
.
| 3 |
| 14 |
| 15 |
| 28 |
=
| 2 |
| 5 |
=4;
(2)
| 9 |
| 5 |
| 2 |
| 3 |
| 18 |
| 35 |
=
| 6 |
| 5 |
| 35 |
| 18 |
=
| 7 |
| 3 |
(3)2014×
| 2012 |
| 2013 |
=(2013+1)×
| 2012 |
| 2013 |
=2013×
| 2012 |
| 2013 |
| 2012 |
| 2013 |
=2012+
| 2012 |
| 2013 |
=2012
| 2012 |
| 2013 |
(4)
| 1 |
| 21 |
| 1 |
| 17 |
=(
| 1 |
| 21 |
| 1 |
| 17 |
=2×5×2014
=10×2014
=20140;
(5)
| 19 |
| 17 |
| 13 |
| 15 |
| 2 |
| 17 |
=
| 19 |
| 17 |
| 13 |
| 15 |
| 2 |
| 17 |
| 1 |
| 15 |
=
| 19 |
| 17 |
| 13 |
| 15 |
| 2 |
| 17 |
| 13 |
| 15 |
=(
| 19 |
| 17 |
| 2 |
| 17 |
| 13 |
| 15 |
=1×
| 13 |
| 15 |
=
| 13 |
| 15 |
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