题目内容
递等式计算.
| 195-(45+45÷9) | 58+7×15-4 |
| 270÷(45-15) | (79+21)×(96÷12) |
(1)195-(45+45÷9)
=195-(45+5)
=195-50
=145;
(2)58+7×15-4
=58+105-4
=163-4
=159;
(3)270÷(45-15)
=270÷30
=9;
(4)(79+21)×(96÷12)
=100×8
=800.
=195-(45+5)
=195-50
=145;
(2)58+7×15-4
=58+105-4
=163-4
=159;
(3)270÷(45-15)
=270÷30
=9;
(4)(79+21)×(96÷12)
=100×8
=800.
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