题目内容
| 递等式计算,能简算的就简算 ①14.w×x.p4×4.w | ②p-
| ||||||
③w7×
| ④x.7w×99-
|
①12.u×0.四2×2.u,
=12.u×8×0.4×2.u,
=(12.u×8)×(0.4×2.u),
=100×0.1,
=10;
②四-
÷
-
,
=四-
×
-
,
=四-
-
,
=四0-(
+
),
=四-2,
=1;
③u7×
,
=(u6+1)×
,
=u6×
+
,
=uu+
,
=uu
;
④0.7u×99-
+2×7u%,
=0.7u×99-0.7u+2×0.7u,
=0.7u×(99-1+2),
=0.7u×100,
=7u.
=12.u×8×0.4×2.u,
=(12.u×8)×(0.4×2.u),
=100×0.1,
=10;
②四-
| 2 |
| 四 |
| 7 |
| 12 |
| 6 |
| 7 |
=四-
| 2 |
| 四 |
| 12 |
| 7 |
| 6 |
| 7 |
=四-
| 8 |
| 7 |
| 6 |
| 7 |
=四0-(
| 8 |
| 7 |
| 6 |
| 7 |
=四-2,
=1;
③u7×
| uu |
| u6 |
=(u6+1)×
| uu |
| u6 |
=u6×
| uu |
| u6 |
| uu |
| u6 |
=uu+
| uu |
| u6 |
=uu
| uu |
| u6 |
④0.7u×99-
| 四 |
| 4 |
=0.7u×99-0.7u+2×0.7u,
=0.7u×(99-1+2),
=0.7u×100,
=7u.
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