题目内容
| 看谁算得准(能简算的要简算). 762-450÷18×25 | 1.5×(3.8-0.8)÷0.9 | 8×
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(1-
|
|
|
(1)762-450÷18×25
=762-625,
=137;
(2)1.5×(3.8-0.8)÷0.9,
=1.5×3÷0.9,
=5;
(3)8×
+
÷
=8×
+
×8,
=(
+
)×8,
=1×8,
=8;
(4)(1-
×70)÷
=(1-
)÷
,
=
×
,
=
;
(5)
÷[1÷(
-
)]
=
÷[1÷
],
=
×
,
=
;
(6)
+(36+
)÷9
=
+36×
+
×
,
=
+
+4,
=5.
=762-625,
=137;
(2)1.5×(3.8-0.8)÷0.9,
=1.5×3÷0.9,
=5;
(3)8×
| 2 |
| 7 |
| 5 |
| 7 |
| 1 |
| 8 |
=8×
| 2 |
| 7 |
| 5 |
| 7 |
=(
| 2 |
| 7 |
| 5 |
| 7 |
=1×8,
=8;
(4)(1-
| 1 |
| 100 |
| 2 |
| 7 |
=(1-
| 7 |
| 10 |
| 2 |
| 7 |
=
| 3 |
| 10 |
| 7 |
| 2 |
=
| 21 |
| 20 |
(5)
| 5 |
| 7 |
| 2 |
| 3 |
| 1 |
| 5 |
=
| 5 |
| 7 |
| 7 |
| 15 |
=
| 5 |
| 7 |
| 7 |
| 15 |
=
| 1 |
| 3 |
(6)
| 4 |
| 5 |
| 9 |
| 5 |
=
| 4 |
| 5 |
| 1 |
| 9 |
| 9 |
| 5 |
| 1 |
| 9 |
=
| 4 |
| 5 |
| 1 |
| 5 |
=5.
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