题目内容
计算,能简便计算的要简便计算.
(1)
| (2)1998÷1998
| ||||||||||||
| (3)(9+92+93)×0.01 | (4)13.5×[1.5×(1.07+1.93)] | ||||||||||||
(5)
| (6)(333+667)÷[63×(
|
(1)
+
+
+
+
=(
-
)+(
-
)+(
-
)+(
-
)+(
-
)
=
-
=
(2)1998÷1998
=1998÷
=1998×
=
(3)(9+92+93)×0.01
=[9+9×(9+9×9)]×0.01,
=[9+9×(9+81)]×0.01,
=[9+9×90]×0.01,
=[9+810]×0.01,
=819×0.01,
=8.19
(4)13.5×[1.5×(1.07+1.93)]
=13.5×[1.5×3]
=13.5×4.5
=60.75
(5)
+
×(
-
)
=
+
×
=
+
=
(6))(333+667)÷[63×(
-
)]
=1000÷[63×
-63×
]
=1000÷[36-28]
=1000÷8
=125
| 1 |
| 30 |
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
=(
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 10 |
=
| 1 |
| 5 |
| 1 |
| 10 |
=
| 1 |
| 10 |
(2)1998÷1998
| 1998 |
| 1999 |
=1998÷
| 1998×1999+1998 |
| 1999 |
=1998×
| 1999 |
| 1998×2000 |
=
| 1999 |
| 2000 |
(3)(9+92+93)×0.01
=[9+9×(9+9×9)]×0.01,
=[9+9×(9+81)]×0.01,
=[9+9×90]×0.01,
=[9+810]×0.01,
=819×0.01,
=8.19
(4)13.5×[1.5×(1.07+1.93)]
=13.5×[1.5×3]
=13.5×4.5
=60.75
(5)
| 1 |
| 12 |
| 11 |
| 12 |
| 5 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 12 |
| 11 |
| 12 |
| 13 |
| 6 |
=
| 1 |
| 12 |
| 143 |
| 72 |
=
| 149 |
| 72 |
(6))(333+667)÷[63×(
| 4 |
| 7 |
| 4 |
| 9 |
=1000÷[63×
| 4 |
| 7 |
| 4 |
| 9 |
=1000÷[36-28]
=1000÷8
=125
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