题目内容
选择合理的方法计算．
①5400-2940÷28×27
②（
-
÷2）÷
③9×（
+
）+
④（
+
）×15×17．
①5400-2940÷28×27
②（
| 1 |
| 4 |
| 1 |
| 10 |
| 3 |
| 10 |
③9×（
| 4 |
| 9 |
| 1 |
| 14 |
| 5 |
| 14 |
④（
| 1 |
| 15 |
| 2 |
| 17 |
①5400-2940÷28×27，
=5400-105×27，
=5400-2835，
=2565；
②（
-
÷2）÷
，
=（
-
）÷
，
=
×
，
=
；
③9×（
+
）+
，
=9×
+9×
+
，
=4+
+
，
=4+（
+
），
=4+1，
=5；
④（
+
）×15×17，
=（
+
）×（15×17），
=
×（15×17）+
×（15×17），
=（
×15）×17+（
×17）×15，
=1×17+2×15，
=17+30，
=47．
=5400-105×27，
=5400-2835，
=2565；
②（
| 1 |
| 4 |
| 1 |
| 10 |
| 3 |
| 10 |
=（
| 1 |
| 4 |
| 1 |
| 20 |
| 3 |
| 10 |
=
| 1 |
| 5 |
| 10 |
| 3 |
=
| 2 |
| 3 |
③9×（
| 4 |
| 9 |
| 1 |
| 14 |
| 5 |
| 14 |
=9×
| 4 |
| 9 |
| 1 |
| 14 |
| 5 |
| 14 |
=4+
| 9 |
| 14 |
| 5 |
| 14 |
=4+（
| 9 |
| 14 |
| 5 |
| 14 |
=4+1，
=5；
④（
| 1 |
| 15 |
| 2 |
| 17 |
=（
| 1 |
| 15 |
| 2 |
| 17 |
=
| 1 |
| 15 |
| 2 |
| 17 |
=（
| 1 |
| 15 |
| 2 |
| 17 |
=1×17+2×15，
=17+30，
=47．
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