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怎样简便怎样算3-19×112+560.9-(0.15+0.35÷57)7.25-337+3.75-647(2-34×45)÷(112+415)
题目详情
怎样简便怎样算
3-
×1
+
0.9-(0.15+0.35÷
)
7.25-3
+3.75-6
(2-
×
)÷(
+
)
3-
1 |
9 |
1 |
2 |
5 |
6 |
5 |
7 |
7.25-3
3 |
7 |
4 |
7 |
3 |
4 |
4 |
5 |
1 |
12 |
4 |
15 |
▼优质解答
答案和解析
① 3-
×1
+
=3-
×
+
=3-
+
=2
+
=3
;
② 0.9-(0.15+0.35÷
)
=0.9-(0.15+
÷
)
=0.9-(0.15+
×
)
=0.9-(0.15+0.49)
=0.9-0.64
=0.26;
③ 7.25-3
+3.75-6
=(7.25+3.75)-(3
+6
)
=11-10
=1;
④ (2-
×
)÷(
+
)
=(2-
)÷
=
×
=4.
1 |
9 |
1 |
2 |
5 |
6 |
=3-
1 |
9 |
3 |
2 |
5 |
6 |
=3-
1 |
6 |
5 |
6 |
=2
5 |
6 |
5 |
6 |
=3
2 |
3 |
② 0.9-(0.15+0.35÷
5 |
7 |
=0.9-(0.15+
7 |
20 |
5 |
7 |
=0.9-(0.15+
7 |
20 |
7 |
5 |
=0.9-(0.15+0.49)
=0.9-0.64
=0.26;
③ 7.25-3
3 |
7 |
4 |
7 |
=(7.25+3.75)-(3
3 |
7 |
4 |
7 |
=11-10
=1;
④ (2-
3 |
4 |
4 |
5 |
1 |
12 |
4 |
15 |
=(2-
3 |
5 |
7 |
20 |
=
7 |
5 |
20 |
7 |
=4.
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