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用递等式计算．①28.49÷7.4×0.32；②（514÷1.25+112）×13-0.975；③（0.2+13）÷23÷0.6；④[（615-0.45）÷1518]÷（113÷6）．
题目详情
用递等式计算．
①28.49÷7.4×0.32；
②（5
÷1.25+1
）×
-0.975；
③（0.2+
）÷
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
÷1.25+1
）×
-0.975；
③（0.2+
）÷
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
1 1 4 4
）×
-0.975；
③（0.2+
）÷
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
1 1 2 2
-0.975；
③（0.2+
）÷
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
1 1 3 3
）÷
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
1 1 3 3
÷0.6；
④[（6
-0.45）÷1
]÷（1
÷6）．
2 2 3 3
-0.45）÷1
]÷（1
÷6）．
1 1 5 5
]÷（1
÷6）．
5 5 18 18
÷6）．
1 1 3 3
①28.49÷7.4×0.32；
②（5
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
| 5 |
| 18 |
| 1 |
| 3 |
| 1 |
| 3 |
▼优质解答
答案和解析
①28.49÷7.4×0.32
=3.85×0.32
=1.232；
②（5
÷1.25+1
）×
-0.975
=（4.2+1.5）×
-0.975
=5.7×
-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 14 4 4÷1.25+1
）×
-0.975
=（4.2+1.5）×
-0.975
=5.7×
-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 12 2 2）×
-0.975
=（4.2+1.5）×
-0.975
=5.7×
-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 13 3 3-0.975
=（4.2+1.5）×
-0.975
=5.7×
-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 13 3 3-0.975
=5.7×
-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 13 3 3-0.975
=1.9-0.975
=0.925；
③（0.2+
）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 13 3 3）÷
÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
2 2 23 3 3÷0.6
=
×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
8 8 815 15 15×
×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
3 3 32 2 2×
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
5 5 53 3 3
=
；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
4 4 43 3 3；
④[（6
-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 15 5 5-0.45）÷1
]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
5 5 518 18 18]÷（1
÷6）
=[
÷1
]÷
=
×
=
．
1 1 13 3 3÷6）
=[
÷1
]÷
=
×
=
．
23 23 234 4 4÷1
]÷
=
×
=
．
5 5 518 18 18]÷
=
×
=
．
2 2 29 9 9
=
×
=
．
9 9 92 2 2×
=
．
9 9 92 2 2
=
．
81 81 814 4 4．
=3.85×0.32
=1.232；
②（5
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
=（4.2+1.5）×
| 1 |
| 3 |
=5.7×
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
=（4.2+1.5）×
| 1 |
| 3 |
=5.7×
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
=（4.2+1.5）×
| 1 |
| 3 |
=5.7×
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 3 |
=（4.2+1.5）×
| 1 |
| 3 |
=5.7×
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 3 |
=5.7×
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 3 |
=1.9-0.975
=0.925；
③（0.2+
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 2 |
| 3 |
=
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 8 |
| 15 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 3 |
| 2 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 5 |
| 3 |
=
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 4 |
| 3 |
④[（6
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 5 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 5 |
| 18 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 1 |
| 3 |
=[
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 23 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 5 |
| 18 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 2 |
| 9 |
=
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 9 |
| 2 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 9 |
| 2 |
=
| 81 |
| 4 |
| 81 |
| 4 |
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