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计算下面各题,能简算的要简算,并写出主要的计算过程.①7.8-8.75+2.2-1.25②13.2÷(9.4-5)+5.32③7-37-47④1317-(517+110)⑤15+(56-1318)
题目详情
计算下面各题,能简算的要简算,并写出主要的计算过程.
①7.8-8.75+2.2-1.25
②13.2÷(9.4-5)+5.32
③7-
-
④
-(
+
)
⑤
+(
-
)
-
④
-(
+
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⑤
+(
-
)
3 3 7 7
④
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+
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-
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4 4 7 7
-(
+
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⑤
+(
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13 13 17 17
+
)
⑤
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5 5 17 17
)
⑤
+(
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)
1 1 10 10
+(
-
)
1 1 5 5
-
)
5 5 6 6
)
13 13 18 18
①7.8-8.75+2.2-1.25
②13.2÷(9.4-5)+5.32
③7-
| 3 |
| 7 |
| 4 |
| 7 |
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
⑤
| 1 |
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| 13 |
| 18 |
| 3 |
| 7 |
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| 7 |
④
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| 17 |
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| 1 |
| 10 |
⑤
| 1 |
| 5 |
| 5 |
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| 13 |
| 18 |
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| 7 |
④
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⑤
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⑤
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▼优质解答
答案和解析
①7.8-8.75+2.2-1.25
=(7.8+2.2)-(8.75+1.25)
=10-10
=0
②13.2÷(9.4-5)+5.32
=13.2÷4.4+5.32
=3+5.32
=8.32
③7-
-
=7-(
+
)
=7-1
=6
④
-(
+
)
=
-
-
=
-
=
⑤
+(
-
)
=
+(
-
)
=
+
=
3 3 37 7 7-
=7-(
+
)
=7-1
=6
④
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=
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⑤
+(
-
)
=
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4 4 47 7 7
=7-(
+
)
=7-1
=6
④
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3 3 37 7 7+
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=7-1
=6
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=6
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63 63 63170 170 170
⑤
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1 1 15 5 5+(
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=(7.8+2.2)-(8.75+1.25)
=10-10
=0
②13.2÷(9.4-5)+5.32
=13.2÷4.4+5.32
=3+5.32
=8.32
③7-
| 3 |
| 7 |
| 4 |
| 7 |
=7-(
| 3 |
| 7 |
| 4 |
| 7 |
=7-1
=6
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 8 |
| 17 |
| 1 |
| 10 |
=
| 63 |
| 170 |
⑤
| 1 |
| 5 |
| 5 |
| 6 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 15 |
| 18 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 1 |
| 9 |
=
| 14 |
| 45 |
| 3 |
| 7 |
| 4 |
| 7 |
=7-(
| 3 |
| 7 |
| 4 |
| 7 |
=7-1
=6
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 8 |
| 17 |
| 1 |
| 10 |
=
| 63 |
| 170 |
⑤
| 1 |
| 5 |
| 5 |
| 6 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 15 |
| 18 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 1 |
| 9 |
=
| 14 |
| 45 |
| 4 |
| 7 |
=7-(
| 3 |
| 7 |
| 4 |
| 7 |
=7-1
=6
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 8 |
| 17 |
| 1 |
| 10 |
=
| 63 |
| 170 |
⑤
| 1 |
| 5 |
| 5 |
| 6 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 15 |
| 18 |
| 13 |
| 18 |
=
| 1 |
| 5 |
| 1 |
| 9 |
=
| 14 |
| 45 |
| 3 |
| 7 |
| 4 |
| 7 |
=7-1
=6
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 8 |
| 17 |
| 1 |
| 10 |
=
| 63 |
| 170 |
⑤
| 1 |
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| 6 |
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| 1 |
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| 13 |
| 18 |
=
| 1 |
| 5 |
| 1 |
| 9 |
=
| 14 |
| 45 |
| 4 |
| 7 |
=7-1
=6
④
| 13 |
| 17 |
| 5 |
| 17 |
| 1 |
| 10 |
=
| 13 |
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| 1 |
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| 8 |
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| 1 |
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