题目内容
脱式计算.
| (125-225÷5)×23 | 78-78÷13×5 | 270÷30-180÷30 | 42+6×(12-4) |
(1)(125-225÷5)×23,
=(125-45)×23,
=80×23,
=1840;
(2)78-78÷13×5,
=78-6×5,
=78-30,
=48;
(3)270÷30-180÷30,
=9-6,
=3;
(4)42+6×(12-4),
=42+6×8,
=42+48,
=90.
=(125-45)×23,
=80×23,
=1840;
(2)78-78÷13×5,
=78-6×5,
=78-30,
=48;
(3)270÷30-180÷30,
=9-6,
=3;
(4)42+6×(12-4),
=42+6×8,
=42+48,
=90.
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