题目内容
计算下面各题,能简算的简算.
①
÷
+
×
②58×102
③
×[
-(
-
)]
④0.888×125×73+999×73.
①
| 5 |
| 12 |
| 15 |
| 21 |
| 1 |
| 4 |
| 3 |
| 5 |
②58×102
③
| 9 |
| 18 |
| 3 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
④0.888×125×73+999×73.
①
÷
+
×
,
=
×
+
×
,
=
+
,
=
;
②58×102,
=58×(100+2),
=58×100+58×2,
=5800+116,
=5916;
③
×[
-(
-
)],
=
×[
-
],
=
×0.
=0;
④0.888×125×73+999×73,
=[(0.8+0.08+0.008)×125]×73+999×73,
=[0.8×125+0.08×125+0.008×125]×73+999×73,
=[100+10+1]×73+999×73,
=111×73+999×73,
=(111+999)×73,
=1110×73,
=81030.
| 5 |
| 12 |
| 15 |
| 21 |
| 1 |
| 4 |
| 3 |
| 5 |
=
| 5 |
| 12 |
| 21 |
| 15 |
| 1 |
| 4 |
| 3 |
| 5 |
=
| 7 |
| 12 |
| 3 |
| 20 |
=
| 11 |
| 15 |
②58×102,
=58×(100+2),
=58×100+58×2,
=5800+116,
=5916;
③
| 9 |
| 18 |
| 3 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 9 |
| 18 |
| 3 |
| 16 |
| 3 |
| 16 |
=
| 9 |
| 18 |
=0;
④0.888×125×73+999×73,
=[(0.8+0.08+0.008)×125]×73+999×73,
=[0.8×125+0.08×125+0.008×125]×73+999×73,
=[100+10+1]×73+999×73,
=111×73+999×73,
=(111+999)×73,
=1110×73,
=81030.
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