
计算下面各题,能简便计算的用简便方法计算.375+450÷18×25 &...
计算下面各题,能简便计算的用简便方法计算.375+450÷18×25195×19+15÷9310÷(52-53)×5613×(126+211)×22....
计算下面各题,能简便计算的用简便方法计算.375+450÷18×25 195×19+15÷9310÷(52-53)×56 13×(126+211)×22.
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(1)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(2)
×
+
÷9,
=
×
+
×
,
=(
+
)×
,
=4×
,
=
;
(3)
÷(
-
)×
,
=
÷
×
,
=
×(
×
),
=
×1,
=
;
(4)13×(
+
)×22,
=(13×22)×(
+
),
=(13×22)×
+(13×22)×
,<
=375+25×25,
=375+625,
=1000;
(2)
19 |
5 |
1 |
9 |
1 |
5 |
=
19 |
5 |
1 |
9 |
1 |
5 |
1 |
9 |
=(
19 |
5 |
1 |
5 |
1 |
9 |
=4×
1 |
9 |
=
4 |
9 |
(3)
3 |
10 |
5 |
2 |
5 |
3 |
5 |
6 |
=
3 |
10 |
5 |
6 |
5 |
6 |
=
3 |
10 |
6 |
5 |
5 |
6 |
=
3 |
10 |
=
3 |
10 |
(4)13×(
1 |
26 |
2 |
11 |
=(13×22)×(
1 |
26 |
2 |
11 |
=(13×22)×
1 |
26 |
2 |
11 |
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