题目内容
脱式计算,能简算的要简算.
①2013×0.25+2013×0.75
②1.25×32×0.25
③12×(
+
-
)
④
+(
-
)÷
.
①2013×0.25+2013×0.75
②1.25×32×0.25
③12×(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
④
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
①2013×0.25+2013×0.75
=2013×(0.25+0.75)
=2013×1
=2013;
②1.25×32×0.25
=1.25×(8×4)×0.25
=(1.25×8)×(4×0.25)
=10×1
=10;
③12×(
+
-
)
=12×
+12×
-12×
)
=10+6-4
=16-4
=12;
④
+(
-
)÷
=
+
÷
=
+
=
.
=2013×(0.25+0.75)
=2013×1
=2013;
②1.25×32×0.25
=1.25×(8×4)×0.25
=(1.25×8)×(4×0.25)
=10×1
=10;
③12×(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
=12×
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
=10+6-4
=16-4
=12;
④
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 8 |
| 9 |
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