题目内容
| 脱式计算. ①8400÷84+15×36 | ②540÷(38-29)×13= |
| ③455+65×(273÷21) | ④(350-270÷45)×23. |
①8400÷84+15×36,
=100+540,
=640;
②540÷(38-29)×13,
=540÷9×13,
=60×13,
=780;
③455+65×(273÷21),
=455+65×13,
=455+845,
=1300;
④(350-270÷45)×23,
=(350-6)×23,
=344×23,
=7912.
=100+540,
=640;
②540÷(38-29)×13,
=540÷9×13,
=60×13,
=780;
③455+65×(273÷21),
=455+65×13,
=455+845,
=1300;
④(350-270÷45)×23,
=(350-6)×23,
=344×23,
=7912.
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