题目内容
下面各题,怎样算简便就怎样计算
| 51×101= |
|
44×1.6-0.16×40= | ||||||||||
| 5.04-2.72-0.28= |
|
165×
|
(1)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(2)
×
×
,
=
;
(3)44×1.6-0.16×40,
=44×1.6-1.6×4,
=(44-4)×1.6,
=40×1.6,
=64;
(4)5.04-2.72-0.28,
=5.04-(2.72+0.28),
=5.04-3,
=2.04;
(5)
÷
×
,
=
×
×
,
=
;
(6)165×
+165×
,
=165×(
+
),
=165×1,
=165.
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(2)
| 3 |
| 7 |
| 2 |
| 3 |
| 7 |
| 12 |
=
| 1 |
| 6 |
(3)44×1.6-0.16×40,
=44×1.6-1.6×4,
=(44-4)×1.6,
=40×1.6,
=64;
(4)5.04-2.72-0.28,
=5.04-(2.72+0.28),
=5.04-3,
=2.04;
(5)
| 1 |
| 8 |
| 3 |
| 4 |
| 6 |
| 11 |
=
| 1 |
| 8 |
| 4 |
| 3 |
| 6 |
| 11 |
=
| 1 |
| 11 |
(6)165×
| 4 |
| 7 |
| 3 |
| 7 |
=165×(
| 4 |
| 7 |
| 3 |
| 7 |
=165×1,
=165.
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