题目内容
用递等式计算(能简算的要简算).
(1)(
+
)÷(0.5-0.2)
(2)18÷[5.2÷(
-
+
)]÷
(3)(
-
-
)÷
(4)(999×1.01+9.9×99.9)÷5×
.
(1)(
| 1 |
| 2 |
| 1 |
| 5 |
(2)18÷[5.2÷(
| 6 |
| 5 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 7 |
(3)(
| 3 |
| 4 |
| 1 |
| 12 |
| 1 |
| 24 |
| 1 |
| 48 |
(4)(999×1.01+9.9×99.9)÷5×
| 1 |
| 6 |
(1)(
| 1 |
| 2 |
| 1 |
| 5 |
=0.7÷0.3,
=
| 7 |
| 3 |
(2)18÷[5.2÷(
| 6 |
| 5 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 7 |
=18÷[5.2÷(
| 8 |
| 15 |
| 1 |
| 3 |
| 2 |
| 7 |
=18÷[5.2÷
| 13 |
| 15 |
| 2 |
| 7 |
=18÷6÷
| 2 |
| 7 |
=3÷
| 2 |
| 7 |
=10.5;
(3)(
| 3 |
| 4 |
| 1 |
| 12 |
| 1 |
| 24 |
| 1 |
| 48 |
=(
| 3 |
| 4 |
| 1 |
| 12 |
| 1 |
| 24 |
=
| 3 |
| 4 |
| 1 |
| 12 |
| 1 |
| 24 |
=36-4-2,
=30;
(4)(999×1.01+9.9×99.9)÷5×
| 1 |
| 6 |
=(99.9×10.1+9.9×99.9)÷5×
| 1 |
| 6 |
=99.9×(10.1+9.9)÷5×
| 1 |
| 6 |
=99.9×20÷5×
| 1 |
| 6 |
=1998÷5×
| 1 |
| 6 |
=399.6×
| 1 |
| 6 |
=66.6.
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