题目内容
简便计算.
|
| ||||||||||||
(
| 手8×
| ||||||||||||
| 我.六×六5×手.六5. |
(h)
+3.9+
+9.6
=(
+
)+(3.9+9.6)
=
+9
=9
;
(i)
×
+
×
=
×(
+
)
=
×h
=
;
(3)(
+
)×ih
=
×ih+
×ih
=h9+h9
=i9;
(9)h8×
=(h9-h)×
=h9×
-
=h9-
=h9
;
(9)
÷
-
×9
=
×hi-
×9
=
×(hi-9)
=
×7
=9.9;
(6)3.i×i9×h.i9
=(9×i9)×(0.8×h.i9)
=h00×h
=h00.
| 9 |
| 9 |
| i |
| 9 |
=(
| 9 |
| 9 |
| i |
| 9 |
=
| i |
| 3 |
=9
| i |
| 3 |
(i)
| 9 |
| hh |
| 7 |
| hi |
| 9 |
| hh |
| 9 |
| hi |
=
| 9 |
| hh |
| 7 |
| hi |
| 9 |
| hi |
=
| 9 |
| hh |
=
| 9 |
| hh |
(3)(
| i |
| 3 |
| 9 |
| 7 |
=
| i |
| 3 |
| 9 |
| 7 |
=h9+h9
=i9;
(9)h8×
| h9 |
| h9 |
=(h9-h)×
| h9 |
| h9 |
=h9×
| h9 |
| h9 |
| h9 |
| h9 |
=h9-
| h9 |
| h9 |
=h9
| 9 |
| h9 |
(9)
| 9 |
| h9 |
| h |
| hi |
| 9 |
| h9 |
=
| 9 |
| h9 |
| 9 |
| h9 |
=
| 9 |
| h9 |
=
| 9 |
| h9 |
=9.9;
(6)3.i×i9×h.i9
=(9×i9)×(0.8×h.i9)
=h00×h
=h00.
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