直接写出得数÷= ×= ×= ÷=﹣= ÷6= 0.64×= +=+= 18﹣= 1÷= 75%÷3=
直接写出得数．+=﹣=+=﹣= 1﹣=+=﹣=+=
直接写出得数．========
直接写出得数．============
计算．﹣++（+） 7﹣（﹣）．
直接写得数：+=﹣=﹣=﹣=+=﹣= 1﹣=+=﹣=+=+5= 5﹣=
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