列式计算．（1）甲数是9.8，比乙数少7.6，求甲乙两数的和．（2）比45的12倍少280的数是多少？（3）把6个34平分成3份，每份是多少？（4）182天有多少个星期？
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直接写得数．========
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+=+=﹣=+=++=+﹣=﹣﹣=﹣+=
直接写出结果．+=×10%= 3.6÷12= 80%×80%=×4÷×4= 15÷1%=﹣+﹣=
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×10%= 3.6÷12= 80%×80%=
×4÷
×4= 15÷1%=
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