题目内容
脱式计算
①907×99×907
②(
+
)÷
+
③(0.125×8-0.5)×4
④[1-(
-
)]×
.
①907×99×907
②(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
③(0.125×8-0.5)×4
④[1-(
| 1 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
①907×99×907
=89793×907
=81442251;
②(
+
)÷
+
=
×
+
=
+
=1
;
③(0.125×8-0.5)×4
=(1-0.5)×4
=0.5×4
=2;
④[1-(
-
)]×
={1-
}×
=
×
=
.
=89793×907
=81442251;
②(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 3 |
| 7 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 14 |
| 20 |
=1
| 3 |
| 20 |
③(0.125×8-0.5)×4
=(1-0.5)×4
=0.5×4
=2;
④[1-(
| 1 |
| 2 |
| 1 |
| 4 |
| 2 |
| 3 |
={1-
| 1 |
| 4 |
| 2 |
| 3 |
=
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
练习册系列答案
相关题目