题目内容
| 计算下列各题.(能简算的要简算) 7÷
| 15÷
| ||||||||||||||
| 3-
| ||||||||||||||
|
|
①7÷
-
÷7,
=7×
-
×
,
=9-
,
=8
;
②15÷
+15×
,
=15×
+15×
,
=(
+
)×15,
=2×15,
=30;
③
÷[
÷(
-
)],
=
÷[
÷
],
=
÷
,
=
;
④3-
×
-
,
=3-
-
,
=3-(
+
),
=3-1,
=2;
⑤
÷[
×(
+
)],
=
÷[
×
],
=
×6,
=
;
⑥
×(7×26),
=
×26×7,
=1×7,
=7.
| 7 |
| 9 |
| 7 |
| 9 |
=7×
| 9 |
| 7 |
| 7 |
| 9 |
| 1 |
| 7 |
=9-
| 1 |
| 9 |
=8
| 8 |
| 9 |
②15÷
| 8 |
| 9 |
| 7 |
| 8 |
=15×
| 9 |
| 8 |
| 7 |
| 8 |
=(
| 9 |
| 8 |
| 7 |
| 8 |
=2×15,
=30;
③
| 3 |
| 22 |
| 5 |
| 4 |
| 14 |
| 3 |
| 1 |
| 2 |
=
| 3 |
| 22 |
| 5 |
| 4 |
| 25 |
| 6 |
=
| 3 |
| 22 |
| 3 |
| 10 |
=
| 5 |
| 11 |
④3-
| 5 |
| 18 |
| 27 |
| 40 |
| 13 |
| 16 |
=3-
| 3 |
| 16 |
| 13 |
| 16 |
=3-(
| 3 |
| 16 |
| 13 |
| 16 |
=3-1,
=2;
⑤
| 8 |
| 15 |
| 5 |
| 32 |
| 9 |
| 10 |
| 1 |
| 6 |
=
| 8 |
| 15 |
| 5 |
| 32 |
| 32 |
| 30 |
=
| 8 |
| 15 |
=
| 16 |
| 5 |
⑥
| 1 |
| 26 |
=
| 1 |
| 26 |
=1×7,
=7.
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