题目内容
计算下面各题,能简算的要简算.
6.6÷[1-(4.1-3.76)]
(19-
)÷19+
×7.7+3.3×0.8-80%
6.6÷[1-(4.1-3.76)]
(19-
| 57 |
| 80 |
| 7 |
| 80 |
| 4 |
| 5 |
(1)6.6÷[1-(4.1-3.76)]
=6.6÷[1-0.34]
=6.6÷0.66,
=10;
(2)(19-
)÷19+
=19÷19-
÷19+
,
=1+(
-
),
=1+
,
=1
;
(3)
×7.7+3.3×0.8-80%
=0.8×7.7+3.3×0.8-0.8,
=(7.7+3.3-1)×0.8,
=10×0.8,
=8.
=6.6÷[1-0.34]
=6.6÷0.66,
=10;
(2)(19-
| 57 |
| 80 |
| 7 |
| 80 |
=19÷19-
| 57 |
| 80 |
| 7 |
| 80 |
=1+(
| 7 |
| 80 |
| 3 |
| 80 |
=1+
| 1 |
| 20 |
=1
| 1 |
| 20 |
(3)
| 4 |
| 5 |
=0.8×7.7+3.3×0.8-0.8,
=(7.7+3.3-1)×0.8,
=10×0.8,
=8.
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