68×37
直接写得数．÷13=×9=÷=+= 20%÷=﹣×0= 6÷=×= 1÷= 0.5×=
直接写出得数． ﹣=+= 2﹣= 0.25+=×=÷= 12÷=×18=
口算：======= 1.25×32×0.25==
直接写出得数．﹣=×=÷= 1÷40%= 4÷﹣÷4= 75%+= ÷22= 80%÷= 26×=×÷×=
24×5= 2300﹣200= 0.8×0.4=÷=：9= 10﹣4.2= 8×12.5%= 26.26÷26= 1.2﹣=÷20= 400÷5÷8= 70+30×2= 0.25÷=+2= 0.32= 99×0.2+0.2=×= 3.36×0.1= a÷2= 48÷60=
÷13=
×9=
÷
=
+
=
=
﹣
=
=
= 0.5×
=
﹣
=
+
= 2﹣
= 0.25+
=
×
=
÷
= 12÷
=
×18=
=
=
=
=
=
=
= 1.25×32×0.25=
=
﹣
=
×
=
÷
= 1÷40%= 4÷
﹣
= 
÷22= 80%÷
= 26×
=
×
÷
÷
=
：9=
=
÷20=
=
+2= 0.32=
×
= 3.36×0.1= a÷2= 48÷60=
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