计算下列各题:(1)3450-450÷25×18=(2)423×118÷6310=(3)18÷2.5+135×6.5=(4)(27+35-542)÷6+413=(5)78×103-(0.2+16-17

题目简介

计算下列各题:(1)3450-450÷25×18=(2)423×118÷6310=(3)18÷2.5+135×6.5=(4)(27+35-542)÷6+413=(5)78×103-(0.2+16-17

题目详情

计算下列各题:
(1)3450-450÷25×18=
(2)4
2
3
×1
1
8
÷6
3
10
=
(3)18÷2.5+1
3
5
×6.5
=
(4)(
2
7
+
3
5
-
5
42
)÷6+4
1
3
=
(5)
7
8
×
10
3
-(0.2+
1
6
-
1
7
10
21
=
(6)
2×2
1×3
+
4×4
3×5
+
6×6
5×7
+
8×8
7×9
+
10×10
9×11
=
题型:解答题难度:中档来源:不详

答案

(1)3450-450÷25×18,
=3450-18×18,
=3450-324,
=3126;

(2)4class="stub"2
3
×1class="stub"1
8
÷6class="stub"3
10

=class="stub"21
4
÷6class="stub"3
10

=class="stub"5
6


(3)18÷2.5+1class="stub"3
5
×6.5

=7.2+10.4,
=17.6;

(4)(class="stub"2
7
+class="stub"3
5
-class="stub"5
42
)÷6+4class="stub"1
3

=(class="stub"31
35
-class="stub"5
42
)÷6+4class="stub"1
3

=class="stub"161
210
÷6+4class="stub"1
3

=class="stub"161
1260
+4class="stub"1
3

=class="stub"5621
1260


(5)class="stub"7
8
×class="stub"10
3
-(0.2+class="stub"1
6
-class="stub"1
7
)÷class="stub"10
21

=class="stub"35
12
-(class="stub"11
30
-class="stub"1
7
)×class="stub"21
10

=class="stub"35
12
-class="stub"47
210
×class="stub"21
10

=class="stub"35
12
-class="stub"47
100

=class="stub"367
150


(6)class="stub"2×2
1×3
+class="stub"4×4
3×5
+class="stub"6×6
5×7
+class="stub"8×8
7×9
+class="stub"10×10
9×11

=1+class="stub"1
3
+1+class="stub"1
15
+1+class="stub"1
35
+1+class="stub"1
63
+1+class="stub"1
99

=5+(class="stub"1
3
+class="stub"1
15
+class="stub"1
35
+class="stub"1
63
+class="stub"1
99
),
=5+class="stub"1
2
×(1-class="stub"1
3
+class="stub"1
3
-class="stub"1
5
+class="stub"1
5
-class="stub"1
7
+class="stub"1
7
-class="stub"1
9
+class="stub"1
9
-class="stub"1
11
),
=5+class="stub"1
2
×(1-class="stub"1
11
),
=5+class="stub"1
2
×class="stub"10
11

=5+class="stub"5
11

=5class="stub"5
11

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