题目内容
脱式计算(能简算的要用简便方法计算):
| ①80÷(1-84%) | ②5-5×
|
③0.25×32×12.5% | ④
|
①80÷(1-84%),
=80÷0.16,
=500;
②5-5×
+
,
=5-2+
,
=3
;
③0.25×32×12.5%,
=0.25×4×8×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;
④
÷
+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
.
=80÷0.16,
=500;
②5-5×
| 2 |
| 5 |
| 3 |
| 5 |
=5-2+
| 3 |
| 5 |
=3
| 3 |
| 5 |
③0.25×32×12.5%,
=0.25×4×8×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;
④
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
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