题目内容
| 下面各题怎样算简便就怎样算. ①(
| ②
| ③15×(9.6-8.6)÷1.2 | ||||||||||||||||
④15-
| ⑤(10×
| ⑥
|
①(
-
)×14
=
×14-
×14,
=7-4,
=3;
②
×
+
×
=(
+
)×
,
=1×
,
=
;
③15×(9.6-8.6)÷1.2
=15×1÷1.2,
=15÷1.2,
=12.5;
④15-
-
=15-
-
,
=14
-
,
=13
;
⑤(10×
+6)×
=(4+6)×
,
=10×
,
=
;
⑥
×[1-(
-
)]×
=
×[1-(
-
)]×
,
=
×[1-
]×
,
=
×
×
,
=
.
| 1 |
| 2 |
| 2 |
| 7 |
=
| 1 |
| 2 |
| 2 |
| 7 |
=7-4,
=3;
②
| 4 |
| 13 |
| 1 |
| 7 |
| 4 |
| 13 |
| 6 |
| 7 |
=(
| 1 |
| 7 |
| 6 |
| 7 |
| 4 |
| 13 |
=1×
| 4 |
| 13 |
=
| 4 |
| 13 |
③15×(9.6-8.6)÷1.2
=15×1÷1.2,
=15÷1.2,
=12.5;
④15-
| 9 |
| 20 |
| 3 |
| 5 |
=15-
| 9 |
| 20 |
| 12 |
| 20 |
=14
| 11 |
| 20 |
| 12 |
| 20 |
=13
| 19 |
| 20 |
⑤(10×
| 2 |
| 5 |
| 13 |
| 14 |
=(4+6)×
| 13 |
| 14 |
=10×
| 13 |
| 14 |
=
| 65 |
| 7 |
⑥
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 5 |
| 11 |
=
| 2 |
| 3 |
| 4 |
| 12 |
| 3 |
| 12 |
| 5 |
| 11 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 5 |
| 11 |
=
| 2 |
| 3 |
| 11 |
| 12 |
| 5 |
| 11 |
=
| 5 |
| 18 |
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