脱式计算.(能简算的要简算)79+九11+49+19114÷49-49÷478÷7九+78÷74九7÷[(九4-2九)÷76]717×(421+817÷710)12-10÷7-47-数学

题目简介

脱式计算.(能简算的要简算)79+九11+49+19114÷49-49÷478÷7九+78÷74九7÷[(九4-2九)÷76]717×(421+817÷710)12-10÷7-47-数学

题目详情

脱式计算.(能简算的要简算)
7
9
+
11
+
4
9
+
19
11
4
9
-
4
9
÷4
7
8
÷
7
+
7
8
÷
7
4
7
÷[(
4
-
2
)÷
7
6
]
7
17
×(
4
21
+
8
17
÷
7
10
12-10÷7-
4
7
题型:解答题难度:中档来源:不详

答案

(1)class="stub"f
9
+class="stub"3
11
+class="stub"4
9
+class="stub"19
11

=(class="stub"f
9
+class="stub"4
9
)+(class="stub"3
11
+class="stub"19
11

=1+2
=3

(2)4÷class="stub"4
9
-class="stub"4
9
÷4
=9-class="stub"1
9

=cclass="stub"c
9


(3)class="stub"f
c
÷class="stub"7
3
+class="stub"f
c
÷class="stub"7
4

=class="stub"f
c
×class="stub"3
7
+class="stub"f
c
×class="stub"4
7

=class="stub"f
c
×(class="stub"3
7
+class="stub"4
7

=class="stub"f
c
×1
=class="stub"f
c


(4)class="stub"3
f
÷[(class="stub"3
4
-class="stub"2
3
)÷class="stub"f
6
]
=class="stub"3
f
÷[class="stub"1
12
÷class="stub"f
6
]
=class="stub"3
f
÷class="stub"1
1c

=6

(f)class="stub"7
1f
×(class="stub"4
21
+class="stub"c
1f
÷class="stub"7
1c

=class="stub"7
1f
×(class="stub"4
21
+class="stub"16
21

=class="stub"7
1f
×class="stub"2c
21

=class="stub"4
9


(6)12-1c÷7-class="stub"4
7

=12-class="stub"1c
7
-class="stub"4
7

=12-(class="stub"1c
7
+class="stub"4
7

=12-2
=1c

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