题目内容
3
×9-3-0.375
999×222+333×334
12
-(3
+2.25-3.6)
[19+19×(1.9-1
)÷0.95]÷0.38.
| 3 |
| 8 |
999×222+333×334
12
| 1 |
| 4 |
| 2 |
| 5 |
[19+19×(1.9-1
| 9 |
| 10 |
(1)3
×9-3-0.375;
=(3+
)×9-3-
,
=3×9+
×9-3-
,
=(27-3)+(
×9-
),
=24+3;
=27;
(2)999×222+333×334,
=333×3×222+333×334,
=333×(3×222+334),
=333×(666+334),
=333×1000,
=333000;
(3)12
-(3
+2.25-3.6),
=12.25-(3.4+2.25-3.6),
=(12.25-2.25)+(3.6-3.4),
=10+0.2,
=10.2;
(4)[19+19×(1.9-1
)÷0.95]÷0.38,
=[19+19×(1.9-1.9)÷0.95]÷0.38,
=19÷0.38,
=50.
| 3 |
| 8 |
=(3+
| 3 |
| 8 |
| 3 |
| 8 |
=3×9+
| 3 |
| 8 |
| 3 |
| 8 |
=(27-3)+(
| 3 |
| 8 |
| 3 |
| 8 |
=24+3;
=27;
(2)999×222+333×334,
=333×3×222+333×334,
=333×(3×222+334),
=333×(666+334),
=333×1000,
=333000;
(3)12
| 1 |
| 4 |
| 2 |
| 5 |
=12.25-(3.4+2.25-3.6),
=(12.25-2.25)+(3.6-3.4),
=10+0.2,
=10.2;
(4)[19+19×(1.9-1
| 9 |
| 10 |
=[19+19×(1.9-1.9)÷0.95]÷0.38,
=19÷0.38,
=50.
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