题目内容
| 用递等式计算(能简算的要简算.) 810÷15÷6 | 239+89+61 | 45×8×25 |
| 275-75÷3 | 17×(606-592) | (672+68)÷37 |
(1)810÷15÷6
=810÷(15×6)
=810÷90
=9;
(2)239+89+61
=239+61+89
=300+89
=389;
(3)45×8×25
=45×(8×25)
=45×200
=9000;
(4)275-75÷3
=275-25
=250;
(5)17×(606-592)
=17×14
=238;
(6)(672+68)÷37
=740÷37
=20.
=810÷(15×6)
=810÷90
=9;
(2)239+89+61
=239+61+89
=300+89
=389;
(3)45×8×25
=45×(8×25)
=45×200
=9000;
(4)275-75÷3
=275-25
=250;
(5)17×(606-592)
=17×14
=238;
(6)(672+68)÷37
=740÷37
=20.
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