题目内容
神机妙算细又巧（能简算的要写出简算过程）
①0.65×14+87×65%-
②(
-
+
)÷
③76×(
-
)+23×(
+
)-53×(
-
)．
①0.65×14+87×65%-
| 13 |
| 20 |
②(
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 24 |
③76×(
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
①0.65×14+87×65%-
=0.65×14+87×0.65-0.65，
=0.65×（14+87-1），
=0.65×100，
=65；
②(
-
+
)÷
=（
-
+
）×24，
=
×24-
×24+
×24，
=16-12+4，
=8；
③76×(
-
)+23×(
+
)-53×(
-
)．
=76×
-76×
+23×
+23×
-53×
+53×
，
=
-
+
+
-
+
，
=（
-
）+（
+
）-（
-
），
=1+1-1，
=1．
| 13 |
| 20 |
=0.65×14+87×0.65-0.65，
=0.65×（14+87-1），
=0.65×100，
=65；
②(
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 24 |
=（
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=16-12+4，
=8；
③76×(
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
=76×
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
=
| 76 |
| 23 |
| 76 |
| 53 |
| 23 |
| 53 |
| 23 |
| 76 |
| 53 |
| 23 |
| 53 |
| 76 |
=（
| 76 |
| 23 |
| 53 |
| 23 |
| 23 |
| 76 |
| 53 |
| 76 |
| 76 |
| 53 |
| 23 |
| 53 |
=1+1-1，
=1．
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