题目内容
| 递等式计算(能简便就要简便) ①
| ②1
| ③
| ||||||||||||||||||||
④10-
| ⑤
| ⑥
|
①
+
-
,
=24×(
+
-
)÷24,
=(24×
+24×
-24×
)÷24,
=(21+10-4)÷24,
=27÷24,
=
,
=1
;
②1
-
-
+
,
=(1
+
)-(
+
),
=1.5-1,
=0.5;
③
-(
+
),
=
-
-
,
=1-
,
=
;
④10-
-
,
=10-(
+
),
=10-
,
=9
;
⑤
-(
-
),
=36×[
-(
-
)]÷36,
=[36×
-36×(
-
)]÷36,
=[20-(30-21)]÷36,
=[20-9]÷36,
=11÷36,
=
;
⑥
+1
+0.4-
,
=(
+0.4)+(1
-
),
=1+1,
=2.
| 7 |
| 8 |
| 5 |
| 12 |
| 1 |
| 6 |
=24×(
| 7 |
| 8 |
| 5 |
| 12 |
| 1 |
| 6 |
=(24×
| 7 |
| 8 |
| 5 |
| 12 |
| 1 |
| 6 |
=(21+10-4)÷24,
=27÷24,
=
| 9 |
| 8 |
=1
| 1 |
| 8 |
②1
| 11 |
| 26 |
| 11 |
| 13 |
| 2 |
| 13 |
| 2 |
| 26 |
=(1
| 11 |
| 26 |
| 2 |
| 26 |
| 11 |
| 13 |
| 2 |
| 13 |
=1.5-1,
=0.5;
③
| 32 |
| 27 |
| 5 |
| 27 |
| 7 |
| 16 |
=
| 32 |
| 27 |
| 5 |
| 27 |
| 7 |
| 16 |
=1-
| 7 |
| 16 |
=
| 9 |
| 16 |
④10-
| 2 |
| 9 |
| 3 |
| 9 |
=10-(
| 2 |
| 9 |
| 3 |
| 9 |
=10-
| 5 |
| 9 |
=9
| 4 |
| 9 |
⑤
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
=36×[
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
=[36×
| 5 |
| 9 |
| 5 |
| 6 |
| 7 |
| 12 |
=[20-(30-21)]÷36,
=[20-9]÷36,
=11÷36,
=
| 11 |
| 36 |
⑥
| 3 |
| 5 |
| 2 |
| 7 |
| 2 |
| 7 |
=(
| 3 |
| 5 |
| 2 |
| 7 |
| 2 |
| 7 |
=1+1,
=2.
练习册系列答案
相关题目