用简便方法计算79÷115+29×511 4×1.27×25 ...
用简便方法计算79÷115+29×5114×1.27×25(57-111)×7-411...
用简便方法计算79÷115+29×511 4×1.27×25 (57-111)×7-411
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推荐于2016-10-31
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(1)
÷
+
×
=
××
+
×
=(
+
)×
=
;
(2)4×1.27×25
=4×25×1.27
=100×1.27
=127;
(3)(
-
)×7-
=
×7-
×7-
=5-(
+
)
=5-1
=4.
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