题目内容
能简算的要简算
①7.6×0.45+6.5×0.76-7
×0.1
②
×
+
③
×1995
④
×
÷
×
⑤
+
+
+
+
.
①7.6×0.45+6.5×0.76-7
| 3 |
| 5 |
②
| 2 |
| 17 |
| 2 |
| 15 |
| 2 |
| 17 |
③
| 1994 |
| 1995 |
④
| 4 |
| 5 |
| 3 |
| 7 |
| 4 |
| 5 |
| 3 |
| 7 |
⑤
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
①7.6×0.45+6.5×0.76-7
×0.1,
=7.6×0.45+0.65×7.6-7.6×0.1,
=7.6×(0.45+0.65-0.1),
=7.6×1,
=7.6;
②
×
+
,
=
×(
+1),
=
×
,
=
;
③
×1995=1994;
④
×
÷
×
,
=(
×
)×(
×
),
=1×
,
=
;
⑤
+
+
+
+
,
=(1-
)+(
-
)+(
-
)+(
-
)+(
-
),
=1-
+
-
+
-
+
-
+
-
,
=1-
,
=
.
| 3 |
| 5 |
=7.6×0.45+0.65×7.6-7.6×0.1,
=7.6×(0.45+0.65-0.1),
=7.6×1,
=7.6;
②
| 2 |
| 17 |
| 2 |
| 15 |
| 2 |
| 17 |
=
| 2 |
| 17 |
| 2 |
| 15 |
=
| 2 |
| 17 |
| 17 |
| 15 |
=
| 2 |
| 15 |
③
| 1994 |
| 1995 |
④
| 4 |
| 5 |
| 3 |
| 7 |
| 4 |
| 5 |
| 3 |
| 7 |
=(
| 4 |
| 5 |
| 5 |
| 4 |
| 3 |
| 7 |
| 3 |
| 7 |
=1×
| 9 |
| 49 |
=
| 9 |
| 49 |
⑤
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
=(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
=1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
=1-
| 1 |
| 6 |
=
| 5 |
| 6 |
练习册系列答案
相关题目