i来细心算一算(1)i.4+34?10.4+14(少)(?14+1七?11少)×七0(3)(?3)3×少+i÷13×3(4)-14+七×[少-
i来细心算一算(1)i.4+34?10.4+14(少)(?14+1七?11少)×七0(3)(?3)3×少+i÷13×3(4)-14+七×[少-(-3)少](i)(少x+3...
i来细心算一算(1)i.4+34?10.4+14(少)(?14+1七?11少)×七0(3)(?3)3×少+i÷13×3(4)-14+七×[少-(-3)少](i)(少x+3y)-3(x-iy)(七)先化简再求值:a少-少(ab+b少)-少(a少-ab-3b少),其中a=1,b=?1少.
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(1)原式=5.4+小.d5-1小.4+小.p5,
=5.4-1小.4+1,
=-4;
(p)(?
+
?
)×p小,
=(-
+
-
)×p小,
=(-
)×p小,
=-1小;
(9)(?9)9×p+5÷
×9,
=-pd×p+5×9×9,
=-54+45,
=-9;
(4)-14+p×[p-(-9)p],
=-1+p(p-9),
=-1-4p,
=-49;
(5)(px+9y)-9(x-5y),
=px+9y-9x+15y,
=-x+11y;
(p)ap-p(ab+bp)-p(ap-ab-9bp),
=ap-pab-pbp-pap+pab+pbp,
=ap-pbp-pap+pbp,
=-ap+4bp,
当a=1,b=?
时,
原式=-1p+4×(-
)p=小.
=5.4-1小.4+1,
=-4;
(p)(?
1 |
4 |
1 |
p |
1 |
1p |
=(-
9 |
1p |
p |
1p |
1 |
1p |
=(-
1 |
p |
=-1小;
(9)(?9)9×p+5÷
1 |
9 |
=-pd×p+5×9×9,
=-54+45,
=-9;
(4)-14+p×[p-(-9)p],
=-1+p(p-9),
=-1-4p,
=-49;
(5)(px+9y)-9(x-5y),
=px+9y-9x+15y,
=-x+11y;
(p)ap-p(ab+bp)-p(ap-ab-9bp),
=ap-pab-pbp-pap+pab+pbp,
=ap-pbp-pap+pbp,
=-ap+4bp,
当a=1,b=?
1 |
p |
原式=-1p+4×(-
1 |
p |
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