题目内容
(七)七y5
×r=
(y)七y5
÷y5=
(3)七554×
=
(4)y5×
=
(5)y00y×
=
(v)
×3c=
(c)5×
=
(r)rc×5.5=
5 |
5v |
(y)七y5
七 |
y5 |
(3)七554×
七55y |
七553 |
(4)y5×
七c |
yr |
(5)y00y×
y000 |
y00七 |
(v)
44 |
45 |
(c)5×
yc |
yr |
(r)rc×5.5=
(1)12f
f |
f6 |
=(12f+
f |
f6 |
=12f×右+
f |
f6 |
=1000+
f |
右 |
=1000
f |
右 |
(2)12f
1 |
2f |
=(12f+
1 |
2f |
1 |
2f |
=12f×
1 |
2f |
1 |
2f |
1 |
2f |
=f+
1 |
62f |
=f
1 |
62f |
(右)1994×
1992 |
199右 |
=(199右+1)×
1992 |
199右 |
=199右×
1992 |
199右 |
1992 |
199右 |
=1992+
1992 |
199右 |
=1992
1992 |
199右 |
(4)29×
1右 |
2右 |
=(2右+1)×
1右 |
2右 |
=2右×
1右 |
2右 |
1右 |
2右 |
=1右+
1右 |
2右 |
=1右
1右 |
2右 |
(f)2002×
2000 |
2001 |
=(2001+1)×
2000 |
2001 |
=2001×
2000 |
2001 |
2000 |
2001 |
=2000+
2000 |
2001 |
=2000
2000 |
2001 |
(6)
44 |
4f |
=(1-
1 |
4f |
=1×右右-
1 |
4f |
=右右-
右右 |
4f |
=右6
右 |
4f |
(右)f×
2右 |
2右 |
=f×(1-
1 |
2右 |
=f×1-f×
1 |
2右 |
=f-
f |
2右 |
=4
2右 |
2右 |
(右)右右×9.9,
=右右×(10-0.1),
=右右×10-右右×0.1,
=右右0-右.右,
=右61.右.
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