题目内容
灵活计算.
| 952-952÷17 | (
|
(
| ||||||||||||||
| 1.28×5.37-2.8×0.537 |
|
|
(1)952-952÷17,
=952-56,
=896;
(2)(
-
×
)÷
,
=(
-
)÷
,
=
÷
,
=
;
(3)(
+
)×12+
,
=
×12+
×12+
,
=5+
+
,
=5+(
+
),
=5+1,
=6;
(4)1.28×5.37-2.8×0.537,
=1.28×5.37-0.28×5.37,
=(1.28-0.28)×5.37,
=1×5.37,
=5.37;
(5)
×
+
÷
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(6)
×
×(2009×42×85),
=
×
×2009×42×85,
=2009×2×5,
=2009×(2×5),
=2009×10,
=20090.
=952-56,
=896;
(2)(
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
| 1 |
| 5 |
=(
| 3 |
| 4 |
| 3 |
| 10 |
| 1 |
| 5 |
=
| 9 |
| 20 |
| 1 |
| 5 |
=
| 9 |
| 4 |
(3)(
| 5 |
| 12 |
| 1 |
| 19 |
| 7 |
| 19 |
=
| 5 |
| 12 |
| 1 |
| 19 |
| 7 |
| 19 |
=5+
| 12 |
| 19 |
| 7 |
| 12 |
=5+(
| 12 |
| 19 |
| 7 |
| 12 |
=5+1,
=6;
(4)1.28×5.37-2.8×0.537,
=1.28×5.37-0.28×5.37,
=(1.28-0.28)×5.37,
=1×5.37,
=5.37;
(5)
| 2 |
| 7 |
| 11 |
| 15 |
| 4 |
| 15 |
| 7 |
| 2 |
=
| 2 |
| 7 |
| 11 |
| 15 |
| 4 |
| 15 |
| 2 |
| 7 |
=
| 2 |
| 7 |
| 11 |
| 15 |
| 4 |
| 15 |
=
| 2 |
| 7 |
=
| 2 |
| 7 |
(6)
| 1 |
| 21 |
| 1 |
| 17 |
=
| 1 |
| 21 |
| 1 |
| 17 |
=2009×2×5,
=2009×(2×5),
=2009×10,
=20090.
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