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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