72% 567%5.67
÷30% × 40÷20%160
40×(1+10%) 40÷(1+10%) 35×(1+10%)
50÷(1+15%) 40+0.1% 20×20%
261﹣99= 17÷34= 2.1+0.79= 80×125%=
÷36= 38.38÷38= +×0= ×3÷×3=
700+280= 0.5×12= 15÷10= 14÷0.2=
3.7+0= 9×80%= 8﹣2.6= +=
=