脱式计算.(1)375+450÷18×25(2)8.5×3-5.85÷1.3(3)12-(34-35)÷34(4)(79+13)÷815×310.-数学

题目简介

脱式计算.(1)375+450÷18×25(2)8.5×3-5.85÷1.3(3)12-(34-35)÷34(4)(79+13)÷815×310.-数学

题目详情

脱式计算.
(1)375+450÷18×25
(2)8.5×3-5.85÷1.3
(3)
1
2
-(
3
4
-
3
5
)÷
3
4

(4)(
7
9
+
1
3
)÷
8
15
×
3
10
题型:解答题难度:中档来源:不详

答案

(1)375+450÷18×25,
=375+25×25,
=375+625,
=1000;

(2)8.5×3-5.85÷1.3,
=25.5-4.5,
=21;

(3)class="stub"1
2
-(class="stub"3
4
-class="stub"3
5
)÷class="stub"3
4

=class="stub"1
2
-class="stub"3
20
×class="stub"4
3

=class="stub"1
2
-class="stub"1
5

=class="stub"3
10


(4)(class="stub"7
9
+class="stub"1
3
)÷class="stub"8
15
×class="stub"3
10

=class="stub"10
9
×class="stub"15
8
×class="stub"3
10

=class="stub"5
8

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