简便运算．400÷25÷8 1.25×0.16×8 ×+÷3 0.8×9.9．
口算． 0.75+= 0÷=×=+20%= 30÷=×12×= 63：27=：=
直接写出得数．==========
直接写出得数： 2.4×= ；= ；：0.75= ；÷ =0.1； 0.180%×= ； 32÷（1+60%）= ； 2﹣1= ； ×40=．
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直接写得数．÷3= 10÷=÷=×=÷=×= 4×= 1﹣=×60=×=×=××=÷5= 30÷=÷=×÷=
×
+
= 0÷
=
×
=
+20%=
=
×12×
= 63：27=
：
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=
=
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=
=
= ；
= ；
：0.75= ；
÷ =0.1；
= ； 32÷（1+60%）= ； 2﹣1
= ； ×40=
．
=
=
=
=
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=
=
÷3= 10÷
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÷
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×
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÷
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×
= 4×
= 1﹣
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×60=
×
=
×
×
×
=
÷5= 30÷
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÷
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×
÷
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