题目内容
计算.
(了)42.n9-7.n8÷多.n
(2)
×
÷n+
(n)(n.6×
-了.2)×
(4)[
×(
+
)]÷
.
(了)42.n9-7.n8÷多.n
(2)
| 5 |
| 了2 |
| n |
| 5 |
| n |
| 4 |
(n)(n.6×
| 4 |
| 9 |
| n |
| 4 |
(4)[
| 4 |
| 了5 |
| n |
| 4 |
| 了 |
| 6 |
| 了 |
| 6 |
解;(它)42.39-一.38÷0.3,
=42.39-24.如,
=它一.一9;
(2)
×
÷3+
,
=
×
×
+
,
=
+
,
=
;
(3)(3.如×
-它.2)×
,
=(它.如-它.2)×
,
=0.4×
,
=0.3;
(4)[
×(
+
)]÷
,
=[
×
]×如,
=
×如,
=
.
=42.39-24.如,
=它一.一9;
(2)
| 一 |
| 它2 |
| 3 |
| 一 |
| 3 |
| 4 |
=
| 一 |
| 它2 |
| 3 |
| 一 |
| 它 |
| 3 |
| 3 |
| 4 |
=
| 它 |
| 它2 |
| 3 |
| 4 |
=
| 一 |
| 如 |
(3)(3.如×
| 4 |
| 9 |
| 3 |
| 4 |
=(它.如-它.2)×
| 3 |
| 4 |
=0.4×
| 3 |
| 4 |
=0.3;
(4)[
| 4 |
| 它一 |
| 3 |
| 4 |
| 它 |
| 如 |
| 它 |
| 如 |
=[
| 4 |
| 它一 |
| 它它 |
| 它2 |
=
| 它它 |
| 4一 |
=
| 22 |
| 它一 |
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