15×6= 55×2= 101×5= 45×102=99×12= 293+99= 900﹣405= 7m+3×m=
直接写出得数：×2=÷=+= 4×（+）= 1÷37.5%= 5÷5÷= 32﹣32×=（ ﹣）×20=
直接写出计算结果．== 8×= 12=== 2﹣= 1=
直接写出得数． 3×=÷0.5= 9÷=÷﹣= （1﹣）÷= 2÷×=
直接写得数．×6= 30×=÷= 20÷=+=××0=×= 1÷×= 5.6÷0.08= 39××=
直接写得数．﹣=÷=×=×= 10×=×=÷=÷= 15×=÷=+=÷22=
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