脱式计算(能简算的要简算).49×54616+34×23÷245÷711-80%×472-613÷926-23(37+117)×42-817(13-14)÷12+56.-数学

题目简介

脱式计算(能简算的要简算).49×54616+34×23÷245÷711-80%×472-613÷926-23(37+117)×42-817(13-14)÷12+56.-数学

题目详情

脱式计算(能简算的要简算).
49×
5
46
1
6
+
3
4
×
2
3
÷2       
4
5
÷
7
11
-80%×
4
7

2-
6
13
÷
9
26
-
2
3
3
7
+
1
17
)×42-
8
17
1
3
-
1
4
)÷
1
2
+
5
6
题型:解答题难度:中档来源:不详

答案

(1)49×class="stub"5
46

=(46+3)×class="stub"5
46

=46×class="stub"5
46
+3×class="stub"5
46

=5+class="stub"15
46

=5class="stub"15
46


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

=class="stub"1
6
+class="stub"1
4

=class="stub"2
12
+class="stub"3
12

=class="stub"5
12


(3)class="stub"4
5
÷class="stub"7
11
-80%×class="stub"4
7

=class="stub"4
5
×class="stub"11
7
-class="stub"4
5
×class="stub"4
7

=(class="stub"11
7
-class="stub"4
7
)×class="stub"4
5

=1×class="stub"4
5

=class="stub"4
5


(4)2-class="stub"6
13
÷class="stub"9
26
-class="stub"2
3

=2-class="stub"6
13
×class="stub"26
9
-class="stub"2
3

=2-class="stub"4
3
-class="stub"2
3

=2-(class="stub"4
3
+class="stub"2
3
),
=2-2,
=0;

(5)(class="stub"3
7
+class="stub"1
17
)×42-class="stub"8
17

=(class="stub"3
7
×42+class="stub"1
17
×42-class="stub"8
17

=18+class="stub"42
17
-class="stub"8
17

=18+(class="stub"42
17
-class="stub"8
17
),
=18+2,
=20;

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

=(class="stub"4
12
-class="stub"3
12
)÷class="stub"1
2
+class="stub"5
6

=class="stub"1
12
×2+class="stub"5
6

=class="stub"1
6
+class="stub"5
6

=1.

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