题目内容
用递等式计算下列各题,能简算的要简算
×0.25+
×
(
+
-
)×12
3
×8-3
+3×7.5
863+47.95÷0.35-529.
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
(
| 3 |
| 4 |
| 11 |
| 6 |
| 13 |
| 24 |
3
| 3 |
| 4 |
| 3 |
| 4 |
863+47.95÷0.35-529.
(1)
×0.25+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)(
+
-
)×12,
=
×12+
×12-
×12,
=9+22-6.5,
=24.5;
(3)3
×8-3
+3×7.5,
=3.75×8-3.75+3×7.5,
=3.75×(8-1)+3×7.5,
=3.75×7+3×7.5,
=26.25+22.5,
=48.75;
(4)863+47.95÷0.35-529,
=863+137-529,
=1000-529,
=471.
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
=
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 6 |
=(
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(2)(
| 3 |
| 4 |
| 11 |
| 6 |
| 13 |
| 24 |
=
| 3 |
| 4 |
| 11 |
| 6 |
| 13 |
| 24 |
=9+22-6.5,
=24.5;
(3)3
| 3 |
| 4 |
| 3 |
| 4 |
=3.75×8-3.75+3×7.5,
=3.75×(8-1)+3×7.5,
=3.75×7+3×7.5,
=26.25+22.5,
=48.75;
(4)863+47.95÷0.35-529,
=863+137-529,
=1000-529,
=471.
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