题目内容
计算:
(1)20
-2.73-8.27+1
(2)
×7
+
×1
×5
(3)[(88+
)×1.125-54]÷23%
(4)[2
÷(3
-
)×1
]÷4.02.
(1)20
| 5 |
| 23 |
| 7 |
| 13 |
(2)
| 5 |
| 9 |
| 5 |
| 12 |
| 1 |
| 9 |
| 7 |
| 12 |
(3)[(88+
| 8 |
| 9 |
(4)[2
| 4 |
| 9 |
| 2 |
| 5 |
| 11 |
| 15 |
| 1 |
| 11 |
(1)20
-2.73-8.27+1
,
=(20
+1
)-(2.73+8.27),
=21
-11,
=10
;
(2)
×7
+
×1
×5,
=
×7
+
×1
,
=(7
+1
)×
,
=9×
,
=5;
(3)[(88+
)×1.125-54]÷23%,
=[(88+
)×1
-54]÷23%,
=[(88×
+
×
)-54]÷23%,
=[99+1-54]÷0.23,
=46÷0.23,
=200;
(4)[2
÷(3
-
)×1
]÷4.02,
=[
÷2
×1
]÷4.02,
=[
×
×
]÷4.02,
=1÷4.02,
=100÷402,
=
.
| 5 |
| 23 |
| 7 |
| 13 |
=(20
| 5 |
| 23 |
| 7 |
| 13 |
=21
| 226 |
| 299 |
=10
| 226 |
| 299 |
(2)
| 5 |
| 9 |
| 5 |
| 12 |
| 1 |
| 9 |
| 7 |
| 12 |
=
| 5 |
| 9 |
| 5 |
| 12 |
| 5 |
| 9 |
| 7 |
| 12 |
=(7
| 5 |
| 12 |
| 7 |
| 12 |
| 5 |
| 9 |
=9×
| 5 |
| 9 |
=5;
(3)[(88+
| 8 |
| 9 |
=[(88+
| 8 |
| 9 |
| 1 |
| 8 |
=[(88×
| 9 |
| 8 |
| 8 |
| 9 |
| 9 |
| 8 |
=[99+1-54]÷0.23,
=46÷0.23,
=200;
(4)[2
| 4 |
| 9 |
| 2 |
| 5 |
| 11 |
| 15 |
| 1 |
| 11 |
=[
| 22 |
| 9 |
| 2 |
| 3 |
| 1 |
| 11 |
=[
| 22 |
| 9 |
| 3 |
| 8 |
| 12 |
| 11 |
=1÷4.02,
=100÷402,
=
| 50 |
| 201 |
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