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用递等式计算(1)400-225÷75×45(2)1.8-3×0.8÷4(3)17.6+4.8+2.4+6.2(4)534×99+534(5)(4-3.5)×(2.4+4)(6)42÷[(18-3.5)×2+6].
题目详情
用递等式计算
(1)400-225÷75×45
(2)1.8-3×0.8÷4
(3)17.6+4.8+2.4+6.2
(4)534×99+534
(5)(4-3.5)×(2.4+4)
(6)42÷[(18-3.5)×2+6].用递等式计算
(1)400-225÷75×45
(2)1.8-3×0.8÷4
(3)17.6+4.8+2.4+6.2
(4)534×99+534
(5)(4-3.5)×(2.4+4)
(6)42÷[(18-3.5)×2+6].
(1)400-225÷75×45
(2)1.8-3×0.8÷4
(3)17.6+4.8+2.4+6.2
(4)534×99+534
(5)(4-3.5)×(2.4+4)
(6)42÷[(18-3.5)×2+6].用递等式计算
(1)400-225÷75×45
(2)1.8-3×0.8÷4
(3)17.6+4.8+2.4+6.2
(4)534×99+534
(5)(4-3.5)×(2.4+4)
(6)42÷[(18-3.5)×2+6].
▼优质解答
答案和解析
(1)400-225÷75×45
=400-3×45
=400-135
=265;
(2)1.8-3×0.8÷4
=1.8-2.4÷4
=1.8-0.6
=1.2;
(3)17.6+4.8+2.4+6.2
=(17.6+2.4)+(4.8+6.2)
=20+11
=31;
(4)534×99+534
=534×(99+1)
=534×100
=53400;
(5)(4-3.5)×(2.4+4)
=0.5×6.4
=3.2;
(6)42÷[(18-3.5)×2+6]
=42÷[14.5×2+6]
=42÷[29+6]
=42÷35
=1.2.
=400-3×45
=400-135
=265;
(2)1.8-3×0.8÷4
=1.8-2.4÷4
=1.8-0.6
=1.2;
(3)17.6+4.8+2.4+6.2
=(17.6+2.4)+(4.8+6.2)
=20+11
=31;
(4)534×99+534
=534×(99+1)
=534×100
=53400;
(5)(4-3.5)×(2.4+4)
=0.5×6.4
=3.2;
(6)42÷[(18-3.5)×2+6]
=42÷[14.5×2+6]
=42÷[29+6]
=42÷35
=1.2.
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