题目内容
| 计算下面各题.(能简算的要简算) 3-
| 920÷40+1.1×500 |
| ||||||||||
(
| 8×4×12.5×2.5 | 2003×
|
(1)3-
+4-
,
=(3+4)-(
+
),
=7-1,
=6;
(2)920÷40+1.1×500,
=23+550,
=573;
(3)
÷9+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(4)(
+
-
)÷
,
=(
+
-
)×24,
=
×24+
×24-
×24,
=20+2-9,
=13;
(5)8×4×12.5×2.5,
=(8×12.5)×(4×2.5),
=100×10,
=1000;
(6)2003×
,
=(2002+1)×
,
=2002×
+1×
,
=2001+
,
=2001
.
| 2 |
| 5 |
| 3 |
| 5 |
=(3+4)-(
| 2 |
| 5 |
| 3 |
| 5 |
=7-1,
=6;
(2)920÷40+1.1×500,
=23+550,
=573;
(3)
| 4 |
| 7 |
| 5 |
| 7 |
| 1 |
| 9 |
=
| 4 |
| 7 |
| 1 |
| 9 |
| 5 |
| 7 |
| 1 |
| 9 |
=(
| 4 |
| 7 |
| 5 |
| 7 |
| 1 |
| 9 |
=
| 9 |
| 7 |
| 1 |
| 9 |
=
| 1 |
| 7 |
(4)(
| 5 |
| 6 |
| 1 |
| 12 |
| 3 |
| 8 |
| 1 |
| 24 |
=(
| 5 |
| 6 |
| 1 |
| 12 |
| 3 |
| 8 |
=
| 5 |
| 6 |
| 1 |
| 12 |
| 3 |
| 8 |
=20+2-9,
=13;
(5)8×4×12.5×2.5,
=(8×12.5)×(4×2.5),
=100×10,
=1000;
(6)2003×
| 2001 |
| 2002 |
=(2002+1)×
| 2001 |
| 2002 |
=2002×
| 2001 |
| 2002 |
| 2001 |
| 2002 |
=2001+
| 2001 |
| 2002 |
=2001
| 2001 |
| 2002 |
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