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用递等式计算(能简算的请简算).①328-195÷13+45②10.25+5.89+0.75+4.11③517÷15+115×1217④(3-37×79)÷13⑤(26+26+26)×13⑥[(47-14)×78]÷910.

题目详情
用递等式计算(能简算的请简算).
①328-195÷13+45②10.25+5.89+0.75+4.11
5
17
÷15+
1
15
×
12
17
④(3-
3
7
×
7
9
)÷
1
3
⑤(26+26+26)×
1
3
⑥[(
4
7
-
1
4
)×
7
8
9
10
▼优质解答
答案和解析
①328-195÷13+45
=328-15+45
=313+45
=358;

②10.25+5.89+0.75+4.11
=(10.25+0.75)+(5.89+4.11)
=11+10
=21;

5
17
÷15+
1
15
×
12
17

=
5
17
×
1
15
+
1
15
×
12
17

=(
5
17
+
12
17
)×
1
15

=1×
1
15

=
1
15


④(3-
3
7
×
7
9
)÷
1
3

=(3-
1
3
)÷
1
3

=
8
3
×3
=8;

⑤(26+26+26)×
1
3

=26×3×
1
3

=26;

⑥[(
4
7
-
1
4
)×
7
8
9
10

=[
9
28
×
7
8
9
10

=
9
32
×
10
9

=
5
16