哥哥把自己的书送8本给妹妹，这样妹妹还是比哥哥少7本，哥哥原来比妹妹多 本书．
直接写得数+= 3+1.75=÷=×=×=﹣=+=×0+3= （+）×=×÷×=
口算下面各题．﹣=+=﹣= 2÷=×6=÷=×6=×=﹣=÷=÷=×=×=÷=÷= 6.4÷0.08= 4﹣2.92=÷=
直接写得数： 1﹣=×=÷2÷= 2×80%=+= 15÷= 35×=×÷×=
直接写出得数．﹣=×= 12×= 1÷=== 1.6×4×0.25= 0÷=
直接写得数．+=÷6=×= 2﹣+=×16= 6﹣=÷=5×÷5×=
+
= 3
+1.75=
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﹣
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= 2÷
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×6=
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×6=
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﹣
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×
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×
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= 6.4÷0.08= 4﹣2.92=
÷
=
=
×
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÷2÷
+
= 15÷
= 35×
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×
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= 12×
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= 1.6×4×0.25= 0÷
=
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÷6=
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= 2﹣
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×16= 6﹣
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=5×
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