脱式计算(其中④、⑤两小题必须简算).①730-240÷15×16②[2.06-(1.73-0.29)]×1.5③712÷[(716+14)×833]④6.8+2.37+7.63+4.2⑤58×17÷

题目简介

脱式计算(其中④、⑤两小题必须简算).①730-240÷15×16②[2.06-(1.73-0.29)]×1.5③712÷[(716+14)×833]④6.8+2.37+7.63+4.2⑤58×17÷

题目详情

脱式计算(其中④、⑤两小题必须简算).
①730-240÷15×16
②[2.06-(1.73-0.29)]×1.5
7
12
÷[(
7
16
+
1
4
)×
8
33
]
④6.8+2.37+7.63+4.2
5
8
×17÷9+3÷8×
17
9
题型:解答题难度:中档来源:不详

答案

①730-240÷15×16,
=730-256,
=474;

②[2.06-(1.73-0.29)]×1.5,
=[2.06-1.44]×1.5,
=0.62×1.5,
=0.93;

class="stub"7
12
÷[(class="stub"7
16
+class="stub"1
4
)×class="stub"8
33
],
=class="stub"7
12
÷[class="stub"11
16
×class="stub"8
33
],
=class="stub"7
12
÷class="stub"1
6

=class="stub"7
12
×6,
=class="stub"7
2


④6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
=11+10,
=21;

class="stub"5
8
×17÷9+3÷8×class="stub"17
9

=class="stub"5
8
×17×class="stub"1
9
+3×class="stub"1
8
×class="stub"17
9

=class="stub"5
8
×class="stub"17
9
+class="stub"3
8
×class="stub"17
9

=(class="stub"5
8
+class="stub"3
8
)×class="stub"17
9

=class="stub"17
9

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