题目内容
用递等式计算,能简算的要简算.
÷(
-0.2)
10.5×(3.8-0.8)÷6.3
×17-17×
45×(
+
-
)
| 4 |
| 9 |
| 5 |
| 6 |
10.5×(3.8-0.8)÷6.3
| 11 |
| 8 |
| 3 |
| 8 |
45×(
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
(1)
÷(
-0.2),
=
÷(
-
),
=
÷
,
=
;
(2)10.5×(3.8-0.8)÷6.3
=10.5×3÷6.3,
=31.5÷6.3,
=5;
(3)
×17-17×
,
=(
-
)×17,
=1×17,
=17;
(4)45×(
+
-
)
=45×
+45×
-45×
,
=35+12-27,
=20.
| 4 |
| 9 |
| 5 |
| 6 |
=
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 5 |
=
| 4 |
| 9 |
| 19 |
| 30 |
=
| 40 |
| 57 |
(2)10.5×(3.8-0.8)÷6.3
=10.5×3÷6.3,
=31.5÷6.3,
=5;
(3)
| 11 |
| 8 |
| 3 |
| 8 |
=(
| 11 |
| 8 |
| 3 |
| 8 |
=1×17,
=17;
(4)45×(
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=45×
| 7 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=35+12-27,
=20.
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