题目内容
用递等式计算.(能简算的就简算)
(1)2.54×9+1.27×(0.5÷O.25)
(2)12÷(4.32-4.O2)×O.47.
(1)2.54×9+1.27×(0.5÷O.25)
(2)12÷(4.32-4.O2)×O.47.
(1)2.54×9+1.27×(0.5÷O.25),
=2.54×9+1.27×2,
=2.54×9+2.54,
=2.54×(9+1),
=2.54×10,
=25.4;
(2)12÷(4.32-4.O2)×O.47,
=12÷0.3×O.47,
=40×O.47,
=18.8.
=2.54×9+1.27×2,
=2.54×9+2.54,
=2.54×(9+1),
=2.54×10,
=25.4;
(2)12÷(4.32-4.O2)×O.47,
=12÷0.3×O.47,
=40×O.47,
=18.8.
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