脱式计算.(841-41)÷25×4 (46-32)×(7+25) 235-135÷5 560÷[490÷(34+36)]
(1)(841-41)÷25×4
=800÷25×4
=32×4
=128;
(2)(46-32)×(7+25)
=14×32
=448;
(3)235-135÷5
=235-27
=208;
(4)560÷[490÷(34+36)]
=560÷[490÷70]
=560÷7
=80.
=800÷25×4
=32×4
=128;
(2)(46-32)×(7+25)
=14×32
=448;
(3)235-135÷5
=235-27
=208;
(4)560÷[490÷(34+36)]
=560÷[490÷70]
=560÷7
=80.
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