13.4+1.6= 7.7-7= 5×0.8= 23.6÷100×10=
2.4×0.5= 9.6-1.62= 8a-3a= 3-3×0.5=
80×3.9×1.25 15.2×9.9+1.52
3.9×8.6+3.9×1.4 4.8×3.5-10.9
34.5+5.34= 340×50=+=
8.7÷0.29= ÷= 48×25%=