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(1)5.28-0.44-(2.56-1.72)(2)21÷[×(1-)](3)7.5×83-2.5×9(4)÷[(-)×]

题目详情
(1)5.28-0.44-(2.56-1.72) (2)21÷[ ×(1- )]
(3)7.5×83-2.5×9 (4) ÷[( - )× ]
▼优质解答
答案和解析
(1)原式=5.28-0.44-0.84
                =5.28-1.28
                =4
(2)原式=21÷( ×
                =21×
                =48
(3)原式=7.5×(83-3)
                =600

(4)原式= ÷( ×
                = ×
                =8