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用递等式计算(能简算的请简算)①7.6-4.8+8.4-5.2②4×0.8×2.5×1.25③79×1314+29÷1413④1375-375÷15×18⑤1.05×(3.8-0.8)÷6.3⑥65×〔(76-49)÷135〕

题目详情
用递等式计算(能简算的请简算)
①7.6-4.8+8.4-5.2 ②4×0.8×2.5×1.25
7
9
×
13
14
+
2
9
÷
14
13
④1375-375÷15×18 ⑤1.05×(3.8-0.8)÷6.3
6
5
×〔(
7
6
-
4
9
)÷
13
5
①7.6-4.8+8.4-5.2 ②4×0.8×2.5×1.25
7
9
×
13
14
+
2
9
÷
14
13
④1375-375÷15×18 ⑤1.05×(3.8-0.8)÷6.3
6
5
×〔(
7
6
-
4
9
)÷
13
5
①7.6-4.8+8.4-5.2 ②4×0.8×2.5×1.25 ③
7
9
×
13
14
+
2
9
÷
14
13
①7.6-4.8+8.4-5.2②4×0.8×2.5×1.25③
7
9
×
13
14
+
2
9
÷
14
13
7
9
×
13
14
+
2
9
÷
14
13
7
9
7799
13
14
+
2
9
÷
14
13
13
14
13131414
2
9
÷
14
13
2
9
2299
14
13
14
13
14141313 ④1375-375÷15×18 ⑤1.05×(3.8-0.8)÷6.3 ⑥
6
5
×〔(
7
6
-
4
9
)÷
13
5
④1375-375÷15×18⑤1.05×(3.8-0.8)÷6.3⑥
6
5
×〔(
7
6
-
4
9
)÷
13
5
6
5
×〔(
7
6
-
4
9
)÷
13
5
6
5
6655
7
6
-
4
9
)÷
13
5
7
6
7766
4
9
)÷
13
5
4
9
4499
13
5
13
5
131355
▼优质解答
答案和解析
①7.6-4.8+8.4-5.2,
=(7.6+8.4)-(4.8+5.2),
=16-10,
=6;

②4×0.8×2.5×1.25,
=(4×2.5)×(0.8×1.25),
=10×1,
=10;

7
9
×
13
14
+
2
9
÷
14
13

=
7
9
×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
7
9
777999×
13
14
+
2
9
÷
14
13

=
7
9
×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414+
2
9
÷
14
13

=
7
9
×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
2
9
222999÷
14
13

=
7
9
×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
14
13
141414131313,
=
7
9
×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
7
9
777999×
13
14
+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414+
2
9
×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
2
9
222999×
13
14

=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414,
=(
7
9
+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
7
9
777999+
2
9
)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
2
9
222999)×
13
14

=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414,
=1×
13
14

=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414,
=
13
14



④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
14
131313141414;


④1375-375÷15×18,
=1375-25×18,
=1375-450,
=925;

⑤1.05×(3.8-0.8)÷6.3,
=1.05×3÷6.3,
=3.15÷6.3,
=0.5;

6
5
×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
6
5
666555×[(
7
6
-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
7
6
777666-
4
9
)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
4
9
444999)÷
13
5
],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
5
131313555],
=
6
5
×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
6
5
666555×[
39
54
÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
39
54
393939545454÷
13
5
],
=
6
5
×
39
54
×
5
13

=
1
3
13
5
131313555],
=
6
5
×
39
54
×
5
13

=
1
3
6
5
666555×
39
54
×
5
13

=
1
3
39
54
393939545454×
5
13

=
1
3
5
13
555131313,
=
1
3
1
3
111333.