题目内容
怎样算简便就怎样算.
(1)(
+20%)×
(2)3.7×125%+1.25×2.7+1
×3.6.
(3)5×
+75%×6-0.75.
(1)(
| 1 |
| 2 |
| 5 |
| 6 |
(2)3.7×125%+1.25×2.7+1
| 1 |
| 4 |
(3)5×
| 3 |
| 4 |
(1)(
+20%)×
=(
+
)×
,
=
×
,
=
;
(2)3.7×125%+1.25×2.7+1
×3.6,
=3.7×1.25+1.25×2.7+1.25×3.6,
=1.25×(3.7+2.7+3.6),
=1.25×10,
=12.5;
(3)5×
+75%×6-0.75,
=5×0.75+0.75×6-0.75,
=(5+6-1)×0.75,
=10×0.75,
=7.5.
| 1 |
| 2 |
| 5 |
| 6 |
=(
| 1 |
| 2 |
| 1 |
| 5 |
| 5 |
| 6 |
=
| 7 |
| 10 |
| 5 |
| 6 |
=
| 7 |
| 12 |
(2)3.7×125%+1.25×2.7+1
| 1 |
| 4 |
=3.7×1.25+1.25×2.7+1.25×3.6,
=1.25×(3.7+2.7+3.6),
=1.25×10,
=12.5;
(3)5×
| 3 |
| 4 |
=5×0.75+0.75×6-0.75,
=(5+6-1)×0.75,
=10×0.75,
=7.5.
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