2.5×80= 5.2+2.1×0= 5.5×11-5.5= 560÷8=
4.5×4= 12.5×0.8= 35×0.6= 21÷1000=
3.67+1.08= 6.7-2.57= 3-1.08= 37×100÷10=
4.3+5= 4.2×100 = 9.8-3.8= 52.6÷100=
125×8 = 5.6-0.5= 3.2+4.5= 450÷50=
3.7 1.4 0.6
0.5×3=
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =