(七)七y555v×r=(y)七y5七y5÷y5=(3)七554×七55y七553=(4)y5×七cyr=(5)y00y×y000y00七=(v)4445×3c=(c)5×ycyr=(r)rc×5.5=-数学
=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×