题目内容
| 脱式计算,能简算的要简算. (1)8.4×
| (2)
| ||||||||||
(3)(
| (4)12.5-(8.5+0.625÷62.5%) |
(1)8.4×
+1.6÷10
=8.4×
+1.6×
,
=(8.4+1.6)×
,
=10×
,
=1;
(2)
÷
+
×
=
×
+
×
,
=(
+
)×
,
=1×
,
=
.
(3)(
+
)×4+
=
×4+
×4+
,
=
+
+1,
=1
;
(4)12.5-(8.5+0.625÷62.5%)
=12.5-(8.5+1),
=12.5-9.5,
=3.
| 1 |
| 10 |
=8.4×
| 1 |
| 10 |
| 1 |
| 10 |
=(8.4+1.6)×
| 1 |
| 10 |
=10×
| 1 |
| 10 |
=1;
(2)
| 3 |
| 7 |
| 5 |
| 6 |
| 4 |
| 7 |
| 6 |
| 5 |
=
| 3 |
| 7 |
| 6 |
| 5 |
| 4 |
| 7 |
| 6 |
| 5 |
=(
| 3 |
| 7 |
| 4 |
| 7 |
| 6 |
| 5 |
=1×
| 6 |
| 5 |
=
| 6 |
| 5 |
(3)(
| 1 |
| 17 |
| 1 |
| 4 |
| 3 |
| 17 |
=
| 1 |
| 17 |
| 1 |
| 4 |
| 3 |
| 17 |
=
| 4 |
| 17 |
| 3 |
| 17 |
=1
| 7 |
| 17 |
(4)12.5-(8.5+0.625÷62.5%)
=12.5-(8.5+1),
=12.5-9.5,
=3.
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