⑴
⑵
⑶
⑷4.8+0.36+5.2+0.64
⑸2.5×1.25×32
⑹8.59×[40÷(3.49﹣3.09)]
1÷0.25= +1 = ×24= + =
400×0.02= 10÷ = 6 ×0= 3× ﹣ ×3=