用简便方法计算下列各题．19×8×125 38+129+71 1756﹣398406×201 16×125 1900÷4÷25．
直接写出得数：×8=÷2=÷=×=×= 1÷=÷60%=×15=﹣= 6.8÷10%= 4.5+=×=
直接写出得数．×30= 2÷=÷=﹣=÷=××=+12.5%=÷=
直接写得数． 25×=÷6=×16=÷= 1÷=×=
直接写出得数÷= 20×=÷=﹣= 12÷50%= 3﹣﹣= 60×20%=÷26=+= 1﹣3%=
直接写出得数×4= 6﹣=÷= 6÷1%= 1÷=×=×0÷= 10+×=××5×7= 0.99×9+0.99=
×8=
÷2=
÷
=
×
=
×
= 1÷
=
÷60%=
×15=
﹣
×
=
×30= 2÷
÷
=
﹣
=
÷
=
×
×
=
+12.5%=
÷
=
=
÷6=
×16=
÷
= 1÷
=
×
=
÷
= 20×
÷
=
﹣
=
= 60×20%=
÷26=
+
= 1﹣3%=
×4= 6﹣
=
÷
= 6÷1%=
=
×
=
×0÷
×
=
×
×5×7= 0.99×9+0.99=
粤公网安备 44130202000953号