题目内容
用递等式计算.
| 50+60×37 | 578-(78+98) | (422+28)÷(375-345) | 570÷5÷2. |
(1)50+60×37,
=50+2220,
=2270;
(2)578-(78+98),
=578-78-98,
=500-98,
=402;
(3)(422+28)÷(375-345),
=450÷30,
=15;
(4)570÷5÷2,
=570÷(5×2),
=570÷10,
=57.
=50+2220,
=2270;
(2)578-(78+98),
=578-78-98,
=500-98,
=402;
(3)(422+28)÷(375-345),
=450÷30,
=15;
(4)570÷5÷2,
=570÷(5×2),
=570÷10,
=57.
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