题目内容
脱式计算.
3.5×0.8+5.5×80%
1.25×0.32×25
(
-
×0.4)÷
3÷
-
÷3.
3.5×0.8+5.5×80%
1.25×0.32×25
(
| 4 |
| 5 |
| 5 |
| 4 |
| 8 |
| 15 |
3÷
| 3 |
| 7 |
| 3 |
| 7 |
(1)3.5×0.8+5.5×80%,
=(3.5+5.5)×0.8,
=9×0.8,
=7.2;
(2)1.25×0.32×25
=(1.25×0.8)×(0.4×25),
=1;
(3)(
-
×0.4)÷
,
=(
-
)×
,
=
×
,
=
;
3÷
-
÷3,
=3×
-
×
,
=7-
,
=6
.
=(3.5+5.5)×0.8,
=9×0.8,
=7.2;
(2)1.25×0.32×25
=(1.25×0.8)×(0.4×25),
=1;
(3)(
| 4 |
| 5 |
| 5 |
| 4 |
| 8 |
| 15 |
=(
| 4 |
| 5 |
| 1 |
| 2 |
| 15 |
| 8 |
=
| 3 |
| 10 |
| 15 |
| 8 |
=
| 9 |
| 16 |
3÷
| 3 |
| 7 |
| 3 |
| 7 |
=3×
| 7 |
| 3 |
| 3 |
| 7 |
| 1 |
| 3 |
=7-
| 1 |
| 7 |
=6
| 6 |
| 7 |
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