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用你喜欢的方法计算下面各题.①23.8−79+6.2−119②37.5+12.5÷2.5×4③(79+23×56)÷415④(517+413)×13×17⑤125×3.2×25⑥777×7100+444×0.09+333×0.05.

题目详情
用你喜欢的方法计算下面各题.
①23.8
7
9
+6.2−
11
9

②37.5+12.5÷2.5×4
(
7
9
+
2
3
×
5
6
4
15

(
5
17
+
4
13
)×13×17
⑤125×3.2×25
⑥777×
7
100
+444×0.09+333×0.05.

7
9
+6.2−
11
9

②37.5+12.5÷2.5×4
(
7
9
+
2
3
×
5
6
4
15

(
5
17
+
4
13
)×13×17
⑤125×3.2×25
⑥777×
7
100
+444×0.09+333×0.05.
7
9
7799
11
9
111199

(
7
9
+
2
3
×
5
6
4
15

(
5
17
+
4
13
)×13×17
⑤125×3.2×25
⑥777×
7
100
+444×0.09+333×0.05.
7
9
7799
2
3
2233
5
6
5566
4
15
441515
(
5
17
+
4
13
)×13×17
⑤125×3.2×25
⑥777×
7
100
+444×0.09+333×0.05.
5
17
551717
4
13
441313

7
100
+444×0.09+333×0.05.
7
100
77100100
▼优质解答
答案和解析
(1)23.8
7
9
+6.2−
11
9

=(23.8+6.2)-(
7
9
+
11
9
),
=30-2,
=28;

(2)37.5+12.5÷2.5×4,
=37.5+5×4,
=37.5+20,
=57.5;

(3)(
7
9
+
2
3
×
5
6
4
15

=(
7
9
+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
7
9
777999+6.2−
11
9
111111999,
=(23.8+6.2)-(
7
9
+
11
9
),
=30-2,
=28;

(2)37.5+12.5÷2.5×4,
=37.5+5×4,
=37.5+20,
=57.5;

(3)(
7
9
+
2
3
×
5
6
4
15

=(
7
9
+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
7
9
777999+
11
9
),
=30-2,
=28;

(2)37.5+12.5÷2.5×4,
=37.5+5×4,
=37.5+20,
=57.5;

(3)(
7
9
+
2
3
×
5
6
4
15

=(
7
9
+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
11
9
111111999),
=30-2,
=28;

(2)37.5+12.5÷2.5×4,
=37.5+5×4,
=37.5+20,
=57.5;

(3)(
7
9
+
2
3
×
5
6
4
15

=(
7
9
+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
(
7
9
777999+
2
3
222333×
5
6
555666)÷
4
15
444151515,
=(
7
9
+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
7
9
777999+
5
9
÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
5
9
555999)÷
4
15

=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
÷
4
15
444151515,
=
4
3
÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
4
3
444333÷
4
15

=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
÷
4
15
444151515,
=5;

(4)(
5
17
+
4
13
)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
(
5
17
555171717+
4
13
444131313)×13×17,
=
5
17
×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
5
17
555171717×13×17+
4
13
×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
4
13
444131313×13×17,
=65+68,
=133;

(5)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;

(6)777×
7
100
+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
7
100
777100100100+444×0.09+333×0.05,
=111×(7×
7
100
+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.
7
100
777100100100+4×0.09+3×0.05),
=111×(0.49+0.36+0.15),
=111×1,
=111.