算一算．
12×5= 8×2+4= 5×700= 604×3=
9×5+5= 120×5= 3+7×7= 505×2=
107×8= 8+2×9= 10×3×2= 7×6×2=
9×2×3= 7+6×9= 4×5×2=
算一算．
12×5= 8×2+4= 5×700= 604×3=
9×5+5= 120×5= 3+7×7= 505×2=
107×8= 8+2×9= 10×3×2= 7×6×2=
9×2×3= 7+6×9= 4×5×2=
=
=
= 1÷80%=
×
=
= 3.5×
= 2﹣
=
=
=
=
=
÷
=
÷4= 18÷
= 10÷10%=（
﹣
）×6=
﹣
﹣
= 102﹣52=
×2010= 12.5×3.5×0.08=
=
= 9.3+9.3×99=
=
=
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