题目内容
【题目】计算题.
(1)(1﹣0.75)×(3.9+2.25÷2.5)
(2)11÷[10.4+(1 ﹣ ÷37.5%)]
(3)(3 ﹣3.125)÷0.5%÷0.5
(4)32× ÷(5.7﹣45×20%× )
【答案】
(1)解:(1﹣0.75)×(3.9+2.25÷2.5)
=(1﹣0.75)×(3.9+0.9)
=0.25×4.8
=0.25×4×1.2
=1×1.2
=1.2
(2)解:11÷[10.4+(1 ﹣ ÷37.5%)]
=11÷[10.4+(1 ﹣1)]
=11÷[10.4+0.6]
=11÷11
=1
(3)解:(3 ﹣3.125)÷0.5%÷0.5
=0.25÷0.005÷0.5
=50÷0.5
=100
(4)解:32× ÷(5.7﹣45×20%× )
=32× ÷(5.7﹣9× )
=32× ÷(5.7﹣4.5)
=32× ÷1.2
=12÷1.2
=10
【解析】
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