脱式计算.(56+712+38)÷1489×3.6+2.9×6.4(29+56-3536)×367.25-337+3.75-6470.75×99+0.753.6-2.8+7.4-6.2-数学

题目简介

脱式计算.(56+712+38)÷1489×3.6+2.9×6.4(29+56-3536)×367.25-337+3.75-6470.75×99+0.753.6-2.8+7.4-6.2-数学

题目详情

脱式计算.
5
6
+
7
12
+
3
8
)÷
1
48
9×3.6+2.9×6.4
2
9
+
5
6
-
35
36
)×36
7.25-3
3
7
+3.75-6
4
7
0.75×99+0.753.6-2.8+7.4-6.2
题型:解答题难度:中档来源:不详

答案


(1)(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;


(2)9×3.6+2.9×6.4,
=32.4+18.56,
=50.96;

(3)(class="stub"2
9
+class="stub"5
6
-class="stub"35
36
)×36,
=class="stub"2
9
×36+class="stub"5
6
×36-class="stub"35
36
×36,
=8+30-35,
=38-35,
=3;

(4)7.25-3class="stub"3
7
+3.75-6class="stub"4
7

=(7.25+3.75)-(3class="stub"3
7
+6class="stub"4
7
),
=11-10,
=1;

(5)0.75×99+0.75,
=0.75×(99+1),
=0.75×100,
=75;

(6)3.6-2.8+7.4-6.2,
=(3.6+7.4)-(2.8+6.2),
=11-9,
=2.

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