题目内容
简算
299÷(299+
)
4×0.8×2.5×12.5
84
×0.375+105
×
.
299÷(299+
| 299 |
| 300 |
4×0.8×2.5×12.5
84
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
299÷(299+
),
=(299×
)÷[(299+
)×
],
=1÷[1+
],
=1÷
,
=
;
4×0.8×2.5×12.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
84
×0.375+105
×
,
=84
×
+105
×
,
=(84
+105
)×
,
=190×
,
=71.25.
| 299 |
| 300 |
=(299×
| 1 |
| 299 |
| 299 |
| 300 |
| 1 |
| 299 |
=1÷[1+
| 1 |
| 300 |
=1÷
| 301 |
| 300 |
=
| 300 |
| 301 |
4×0.8×2.5×12.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
84
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
=84
| 18 |
| 19 |
| 3 |
| 8 |
| 1 |
| 19 |
| 3 |
| 8 |
=(84
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
=190×
| 3 |
| 8 |
=71.25.
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