题目内容
| 计算下面各题,能简算的要用简便方法计算. ①73.25+
| ②12.5×2.5×32 | ③
| ||||||||||||||
| ④23.2×15+33.8÷2.6 | ⑤(
| ⑥
|
①73.25+
+26.75+
,
=(73.25+26.75)+(
+
),
=100+1,
=101;
②12.5×2.5×32,
=(12.5×8)×(2.5×4),
=100×10,
=1000;
③
×
+
÷7,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
④23.2×15+33.8÷2.6,
=348+13,
=361;
⑤(
+
)÷
+
,
=(
+
)×
+
,
=
×
+
,
=
+
,
=
,
=1
;
⑥
÷(3-
-
),
=
÷[3-(
+
)],
=
÷[3-1],
=
×
,
=
.
| 4 |
| 7 |
| 3 |
| 7 |
=(73.25+26.75)+(
| 4 |
| 7 |
| 3 |
| 7 |
=100+1,
=101;
②12.5×2.5×32,
=(12.5×8)×(2.5×4),
=100×10,
=1000;
③
| 11 |
| 27 |
| 1 |
| 7 |
| 16 |
| 27 |
=
| 11 |
| 27 |
| 1 |
| 7 |
| 16 |
| 27 |
| 1 |
| 7 |
=
| 1 |
| 7 |
| 11 |
| 27 |
| 16 |
| 27 |
=
| 1 |
| 7 |
=
| 1 |
| 7 |
④23.2×15+33.8÷2.6,
=348+13,
=361;
⑤(
| 4 |
| 5 |
| 1 |
| 4 |
| 7 |
| 3 |
| 7 |
| 10 |
=(
| 16 |
| 20 |
| 5 |
| 20 |
| 3 |
| 7 |
| 7 |
| 10 |
=
| 21 |
| 20 |
| 3 |
| 7 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 14 |
| 20 |
=
| 23 |
| 20 |
=1
| 3 |
| 20 |
⑥
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
| 5 |
| 13 |
| 8 |
| 13 |
=
| 1 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 8 |
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