| 4 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
| 4 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
=（0.7×1
| 4 |
| 9 |
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
=（1
| 4 |
| 9 |
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
=2×0.7+3×15，
=1.4+45，
=46.4．
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7×149+234×l5+0.7×59+14×l5．
编辑：chaxungu时间：2026-04-27 13:18:24分类：小学数学题库
0.7×1
+2
×l5+0.7×
+
×l5．0.7×1
+2
×l5+0.7×
+
×l5，
=（0.7×1
+0.7×
）+（2
×15+
×15），
=（1
+
）×0.7+（2
+
）×15，
=2×0.7+3×15，
=1.4+45，
=46.4．
=（0.7×1
=（1
=2×0.7+3×15，
=1.4+45，
=46.4．
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