题目内容
脱式计算.(能简算的要简算.)
| 120.8×2.75-0.8×2.75 | ||||||||
32×
| 63×(
|
①
÷
+
÷
,
=
×
+
×
,
=(
+
)×
,
=
;
②120.8×2.75-0.8×2.75,
=2.75×(120.8-0.8),
=2.75×120,
=330;
③32×
+1÷125%,
=9.6+0.8,
=10.4;
④63×(
-
)-0.125,
=63×
-63×
-
,
=18-(
+
),
=18-1,
=17.
| 2 |
| 7 |
| 4 |
| 9 |
| 5 |
| 7 |
| 4 |
| 9 |
=
| 2 |
| 7 |
| 9 |
| 4 |
| 5 |
| 7 |
| 9 |
| 4 |
=(
| 2 |
| 7 |
| 5 |
| 7 |
| 9 |
| 4 |
=
| 9 |
| 4 |
②120.8×2.75-0.8×2.75,
=2.75×(120.8-0.8),
=2.75×120,
=330;
③32×
| 3 |
| 10 |
=9.6+0.8,
=10.4;
④63×(
| 2 |
| 7 |
| 1 |
| 72 |
=63×
| 2 |
| 7 |
| 1 |
| 72 |
| 1 |
| 8 |
=18-(
| 7 |
| 8 |
| 1 |
| 8 |
=18-1,
=17.
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