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附加题:巧算(519+…+519)×115(19个)3.41×9.9×0.38÷0.19÷3310÷1.1.

题目详情
附加题:巧算
5
19
+…+
5
19
)×
1
15
 (19个)
3.41×9.9×0.38÷0.19÷3
3
10
÷1.1.

5
19
+…+
5
19
)×
1
15
 (19个)
3.41×9.9×0.38÷0.19÷3
3
10
÷1.1.
5
19
551919
5
19
)×
1
15
 (19个)
3.41×9.9×0.38÷0.19÷3
3
10
÷1.1.
5
19
551919
1
15
 (19个)
3.41×9.9×0.38÷0.19÷3
3
10
÷1.1.
1
15
111515
3
3
10
÷1.1.
3
10
331010
▼优质解答
答案和解析
(1)(
5
19
+…+
5
19
)×
1
15
 (19个)
=
5
19
×19×
1
15

=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
5
19
555191919+…+
5
19
)×
1
15
 (19个)
=
5
19
×19×
1
15

=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
5
19
555191919)×
1
15
 (19个)
=
5
19
×19×
1
15

=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
1
15
111151515 (19个)
=
5
19
×19×
1
15

=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
5
19
555191919×19×
1
15

=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
1
15
111151515
=5×
1
15

=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
1
15
111151515
=
1
3


(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
1
3
111333

(2)3.41×9.9×0.38÷0.19÷3
3
10
÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
3
3
10
333101010÷1.1
=3.41÷3.3×(9.9÷1.1)×(0.38÷0.19)
=3.41÷3.3×9×2
=3.41×
10
33
×18
=18.6
10
33
101010333333×18
=18.6