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计算.(能计算的要简算)1909+3264÷16-24×5135.2÷[(548+452)×(8-7.48)](4.05-2.83-0.17)×2217×1715×1.5÷(150÷15)[213+(5.4-223)×123]÷349

题目详情
计算.(能计算的要简算)
1909+3264÷16-24×5                      135.2÷[(548+452)×(8-7.48)]
(4.05-2.83-0.17)×2
2
17
×17              15×1.5÷(150÷15)
[2
1
3
+(5.4-2
2
3
)×1
2
3
]÷3
4
9
                 2
4
5
×23.4+11.2×2.8+6.54×28.
▼优质解答
答案和解析
①1909+3264÷16-24×5
=1909+204-120
=1993

②135.2÷[(548+452)×(8-7.48)]
=135.2÷(1000×0.52)
=135.2÷520
=0.26

③(4.05-2.83-0.17)×2
2
17
×17
=[4.05-(2.83+0.17)]×(2
2
17
×17)
=(4.05-3)×36
=1.05×36
=37.8

④15×1.5÷(150÷15)
=15×1.5÷10
=22.5÷10
=2.25

⑤[2
1
3
+(5.4-2
2
3
)×1
2
3
]÷3
4
9

=
7
3
×
9
31
+(5.4-2
2
3
)×
5
3
×
9
31

=
21
31
+(5.4-
8
3
)×
15
31

=
21
31
+
27
5
×
15
31
-
8
3
×
15
31

=
21
31
+
81
31
-
40
31

=2

⑥2
4
5
×23.4+11.2×2.8+6.54×28
=2.8×23.4+11.2×2.8+65.4×2.8
=2.8×(23.4+11.2+65.4)
=2.8×100
=280