1800÷45= 6.4+9.6= 0.875﹣= 12×98≈
56×= 1.6×125%= ×24÷= 9+11+13+……+41=
56×10%= 3.2+1.78= ﹣= 0.72÷0.6=
1.25×8= 4÷= ×= ×6÷×6=
①9.52÷3.4+4.8×0.375
②18.67﹣(5.77+4.17)﹣4.23
③31.3×8.1+12.5×6.1+43.8×1.9
④×+++
⑤2.31+[(4.75-×0.4)×]
3+6+4=
8+5+2=
6+7-2=
19-3-5=
9+7-3=
14-4+6=