80÷4= 40÷4= 60÷3= 50÷5=33÷3= 42÷2= 70÷7= 90÷2=
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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=
=
÷
=
÷
= 1+
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×
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×
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×8=
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= 6÷
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= 1﹣
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+1÷3= 6×
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×
= 500×3%=
×8=
÷2=
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×
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= 1÷
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÷60%=
×15=
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