题目内容
脱式计算,能简算的要简算.
|
| 125×3.2×25 | ||||||||||||||
3
| (
| 4-[3.75×(1.2-
|
(1)
×(9-
-
),
=
×[9-(
+
)],
=
×[9-1],
=
×8,
=6;
(2)
÷7+
×
,
=(
+
)×
,
=
×
,
=
;
(3)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;
(4)3
×3.7+3.6+
×3
,
=3
×(3.7+1+0.6),
=3
×5.3,
=19.08;
(5)(
+
)×7×5,
=
×7×5+
×7×5,
=10+7,
=17;
(6)4-[3.75×(1.2-
)+
],
=4-[3.75×
+
],
=4-[
+
],
=4-4,
=0.
| 3 |
| 4 |
| 7 |
| 9 |
| 2 |
| 9 |
=
| 3 |
| 4 |
| 7 |
| 9 |
| 2 |
| 9 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=6;
(2)
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=(
| 8 |
| 13 |
| 6 |
| 13 |
| 1 |
| 7 |
=
| 14 |
| 13 |
| 1 |
| 7 |
=
| 2 |
| 13 |
(3)125×3.2×25,
=(125×8)×(0.4×25),
=1000×10,
=10000;
(4)3
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
=3
| 3 |
| 5 |
=3
| 3 |
| 5 |
=19.08;
(5)(
| 2 |
| 7 |
| 1 |
| 5 |
=
| 2 |
| 7 |
| 1 |
| 5 |
=10+7,
=17;
(6)4-[3.75×(1.2-
| 1 |
| 3 |
| 3 |
| 4 |
=4-[3.75×
| 13 |
| 15 |
| 3 |
| 4 |
=4-[
| 13 |
| 4 |
| 3 |
| 4 |
=4-4,
=0.
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