
用自己喜欢的方法计算. 5.4÷[2.6×(3.7-2.9)+0.62] 999×999+1999 &nb...
用自己喜欢的方法计算.5.4÷[2.6×(3.7-2.9)+0.62]999×999+199923÷[1-(13?14)]....
用自己喜欢的方法计算. 5.4÷[2.6×(3.7-2.9)+0.62] 999×999+1999 23÷[1-(13?14)].
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(1)5.4÷[2.6×(3.7-2.9)+0.62],
=5.4÷[2.6×0.8+0.62],
=5.4÷[2.08+0.62],
=5.4÷2.7,
=2;
(2)999×999+1999,
=999×999+999+1000,
=999×(999+1)+1000,
=999×1000+1000,
=999000+1000,
=1000000;
(3)
÷[1-(
?
)],
=
÷[1-
],
=
÷
,
=
.
=5.4÷[2.6×0.8+0.62],
=5.4÷[2.08+0.62],
=5.4÷2.7,
=2;
(2)999×999+1999,
=999×999+999+1000,
=999×(999+1)+1000,
=999×1000+1000,
=999000+1000,
=1000000;
(3)
2 |
3 |
1 |
3 |
1 |
4 |
=
2 |
3 |
1 |
12 |
=
2 |
3 |
11 |
12 |
=
8 |
11 |
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