脱式计算,能简算的要简算.(1)250×16-48048÷24(2)18÷1.5-0.5×0.3(3)25×1.25×32(4)5.58-35+5.42-25(5)(56+712+38)÷148(6)

题目简介

脱式计算,能简算的要简算.(1)250×16-48048÷24(2)18÷1.5-0.5×0.3(3)25×1.25×32(4)5.58-35+5.42-25(5)(56+712+38)÷148(6)

题目详情

脱式计算,能简算的要简算.
(1)250×16-48048÷24 
(2)18÷1.5-0.5×0.3 (3)25×1.25×32
(4)5.58-
3
5
+5.42-
2
5
(5)(
5
6
+
7
12
+
3
8
)÷
1
48
(6)[1-(
1
2
+
1
3
)×
1
5
5
6
题型:解答题难度:中档来源:不详

答案

(1)250×16-48048÷24,
=4000-2002,
=1998;

(2)18÷1.5-0.5×0.3,
=12-0.15,
=11.85;

(3)25×1.25×32,
=25×1.25×4×8,
=(25×4)×(1.25×8),
=100×10,
=1000;

(4)5.58-class="stub"3
5
+5.42-class="stub"2
5

=(5.58+5.42)-(class="stub"3
5
+class="stub"2
5
),
=11-1,
=10;

(5)(class="stub"5
6
+class="stub"7
12
+class="stub"3
8
)÷class="stub"1
48

=(class="stub"5
6
+class="stub"7
12
+class="stub"3
8
)×48,
=class="stub"5
6
×48+class="stub"7
12
×48+class="stub"3
8
×48,
=40+28+18,
=68+18,
=86;

(6)[1-(class="stub"1
2
+class="stub"1
3
)×class="stub"1
5
class="stub"5
6

=[1-class="stub"5
6
×class="stub"1
5
class="stub"5
6

=[1-class="stub"1
6
]÷class="stub"5
6

=class="stub"5
6
÷class="stub"5
6

=1.

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