题目内容
| 用递等式计算下面各题. (34+19)×(252÷12) | 300-156+244 | 6×58-(275+38) | 140-40×2+28. |
(1)(34+19)×(252÷12),
=53×21,
=1113;
(2)300-156+244,
=144+244,
=388;
(3)6×58-(275+38),
=348-313,
=35;
(4)140-40×2+28,
=140-80+28,
=60+28,
=88.
=53×21,
=1113;
(2)300-156+244,
=144+244,
=388;
(3)6×58-(275+38),
=348-313,
=35;
(4)140-40×2+28,
=140-80+28,
=60+28,
=88.
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