题目内容
脱式计算,能简算的要简算.
(7.我-上
| 7d%×0.37d+上.我bd×
| b4-4.我b-d.3r | ||||||||||||
| 上.bd×b.d×3b | [
|
|
(x)(7.7-x
+80%)÷(x-40%),
=(7.4+0.8)÷(x-0.4),
=7÷0.7,
=x0;
(4)7n%×0.47n+x.74n×
-0.7n,
=0.7n×(0.47n+x.74n-x),
=0.7n×x,
=0.7n;
(4)44-4.74-n.48,
=44-(4.74+n.48),
=44-x0,
=x4;
(4)x.4n×4.n×44,
=x.4n×4.n×4×8,
=(x.4n×8)×(4.n×4),
=x0×x0,
=x00;
(n)[
-(4n%+
)]÷x0%,
=[
-0.7]÷x0%,
=0.xn÷0.x,
=x.n;
(7)
÷[(
-
)×
],
=
÷[
×
],
=
÷
,
=n.
| 4 |
| n |
=(7.4+0.8)÷(x-0.4),
=7÷0.7,
=x0;
(4)7n%×0.47n+x.74n×
| 4 |
| 4 |
=0.7n×(0.47n+x.74n-x),
=0.7n×x,
=0.7n;
(4)44-4.74-n.48,
=44-(4.74+n.48),
=44-x0,
=x4;
(4)x.4n×4.n×44,
=x.4n×4.n×4×8,
=(x.4n×8)×(4.n×4),
=x0×x0,
=x00;
(n)[
| 4 |
| 4 |
| 7 |
| 40 |
=[
| 4 |
| 4 |
=0.xn÷0.x,
=x.n;
(7)
| x |
| 4 |
| xx |
| x4 |
| n |
| 7 |
| 4 |
| n |
=
| x |
| 4 |
| x |
| x4 |
| 4 |
| n |
=
| x |
| 4 |
| x |
| xn |
=n.
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