蛋糕房一共做了212个甜甜圈，饼干315个，问制作的甜甜圈比饼干少多少个？
直接写出得数．=========
直接写出得数．÷= 0×=÷= 1+=×=÷=×=÷=
直接写得数．×8=÷== 6÷=÷= 21×= 1﹣÷=×=
直接写出得数． 1÷100÷10= 1﹣=+1÷3= 6×= 60%÷12=×=÷= 500×3%=
直接写出得数：×8=÷2=÷=×=×= 1÷=÷60%=×15=﹣= 6.8÷10%= 4.5+=×=
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= 6÷
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+1÷3= 6×
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= 500×3%=
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÷60%=
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