题目内容
脱式计算:
| (1)(315×4-364)÷7 | (2)21×9-962÷74 | (3)2600÷(1100-36×25) | (4)17×(290-288÷2) |
(1)(315×4-364)÷7,
=(1260-364)÷7,
=896÷7,
=128;
(2)21×9-962÷74,
=189-13,
=176;
(3)2600÷(1100-36×25),
=2600÷(1100-900),
=2600÷200,
=13;
(4)17×(290-288÷2),
=17×(290-144),
=17×146,
=2482.
=(1260-364)÷7,
=896÷7,
=128;
(2)21×9-962÷74,
=189-13,
=176;
(3)2600÷(1100-36×25),
=2600÷(1100-900),
=2600÷200,
=13;
(4)17×(290-288÷2),
=17×(290-144),
=17×146,
=2482.
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