笔算620﹣23=320+490=1000﹣357=850+120=
直接写得数． 9﹣2.64= 56÷0.56=×12= 630×9%=÷= 1﹣=+= 0×÷=
直接写得数． 12.5+3.5= 87.05÷0.5=×= 18÷0.03=×=+= 2﹣= 13.2×0.5=×14=÷=
直接写得数． 1.4+1.5= 1﹣0.611= 1÷67= 1.6﹣13%= 12：16= 0÷35= 0.9+99×0.9=（56+14）×12=
直接写出得数．×80= 99÷= 9.6×=÷= 7÷=÷=×÷=×÷×=×0+=×÷=
计算下面各题×÷2×18×÷× 4÷÷（﹣）÷．
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×12= 630×9%=
÷
= 1﹣
=
+
= 0×
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=
×
= 18÷0.03=
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= 13.2×0.5=
×14=
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=
×80= 99÷
= 9.6×
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= 7÷
=
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=
×
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=
×
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×0+
=
×
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×
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×18×
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