计算下面各题,能简算的要简算.(23+12÷3)÷342.8×14+7.2×25%45×47×54-1379÷125+29×51216+34×23÷259×6+49÷16.-数学

题目简介

计算下面各题,能简算的要简算.(23+12÷3)÷342.8×14+7.2×25%45×47×54-1379÷125+29×51216+34×23÷259×6+49÷16.-数学

题目详情

计算下面各题,能简算的要简算.
2
3
+
1
2
÷3)÷
3
4
2.8×
1
4
+7.2×25%
4
5
×
4
7
×
5
4
-
1
3
7
9
÷
12
5
+
2
9
×
5
12
1
6
+
3
4
×
2
3
÷2
5
9
×6+
4
9
÷
1
6
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"2
3
+class="stub"1
2
÷3)÷class="stub"3
4

=(class="stub"2
3
+class="stub"1
6
)÷class="stub"3
4

=class="stub"5
6
÷class="stub"3
4

=class="stub"10
9


(2)2.8×class="stub"1
4
+7.2×25%,
=(2.8+7.2)×25%,
=10×0.25,
=2.5;

(3)class="stub"4
5
×class="stub"4
7
×class="stub"5
4
-class="stub"1
3

=class="stub"4
5
×class="stub"5
4
×class="stub"4
7
-class="stub"1
3

=1×class="stub"4
7
-class="stub"1
3

=class="stub"4
7
-class="stub"1
3

=class="stub"5
21


(4)class="stub"7
9
÷class="stub"12
5
+class="stub"2
9
×class="stub"5
12

=class="stub"7
9
×class="stub"5
12
+class="stub"2
9
×class="stub"5
12

=(class="stub"7
9
+class="stub"2
9
)×class="stub"5
12

=1×class="stub"5
12

=class="stub"5
12


(5)class="stub"1
6
+class="stub"3
4
×class="stub"2
3
÷2,
=class="stub"1
6
+class="stub"1
2
÷2,
=class="stub"1
6
+class="stub"1
4

=class="stub"5
12


(6)class="stub"5
9
×6+class="stub"4
9
÷class="stub"1
6

=class="stub"5
9
×6+class="stub"4
9
×6,
=(class="stub"5
9
+class="stub"4
9
)×6,
=1×6,
=6.

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