问题
填空题
当a=0.8，b=1.2，a+0.7=______；ab=______；4a+5b=______．
答案
当a=0.8，b=1.2时，
a+0.7，
=0.8+0.7，
=1.5；
ab，
=0.8×1.2，
=0.96；
4a+5b，
=4×0.8+5×1.2，
=3.2+6，
=9.2．
故答案为：1.5；0.96；9.2．
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当a=0.8，b=1.2，a+0.7=______；ab=______；4a+5b=______．
当a=0.8，b=1.2时，
a+0.7，
=0.8+0.7，
=1.5；
ab，
=0.8×1.2，
=0.96；
4a+5b，
=4×0.8+5×1.2，
=3.2+6，
=9.2．
故答案为：1.5；0.96；9.2．
| 阅读理解。阅读下面短文，请从方框中选出适当的句子填入文中的适当位置，使短文内容完整正确。 | |
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