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脱式计算.45.76-(12.4+5.76)2.5×33×0.419.4×0.9+0.1×19.445×10.20.324÷〔(0.4+0.5)×0.6〕0.45×101-0.45.

题目详情
脱式计算.
45.76-(12.4+5.76)2.5×33×0.419.4×0.9+0.1×19.4
45×10.20.324÷〔(0.4+0.5)×0.6〕0.45×101-0.45.
▼优质解答
答案和解析
(1)45.76-(12.4+5.76)
=45.76-12.4-5.76
=(45.76-5.76)-12.4
=40-12.4
=27.6

(2)2.5×33×0.4
=(2.5×0.4)×33
=1×33
=33

(3)19.4×0.9+0.1×19.4
=19.4×(0.9+0.1)
=19.4×1
=19.4

(4)45×10.2
=45×(10+0.2)
=45×10+45×0.2
=450+9
=459

(5)0.324÷[(0.4+0.5)×0.6]
=0.324÷[0.9×0.6]
=0.324÷0.54
=0.6

(6)0.45×101-0.45
=0.45×(101-1)
=0.45×100
=45