问题
解答题
用递等式计算:
(841-41)÷25×4
560÷[490÷(34+36)]
360÷(30+30)×2
224÷[(2+6)×2].
答案
(1)(841-41)÷25×4
=800÷25×4
=32×4
=128
(2)560÷[490÷(34+36)]
=560÷[490÷70]
=560÷7
=80
(3)360÷(30+30)×2
=360÷60×2
=6×2
=12
(4)224÷[(2+6)×2]
=224÷[8×2]
=224÷16
=14