0.2米2厘米 1.25×0.86 0.86 10.1×0.1 10.1+0.1
0.700 0.70 2.7×1.21.2 1.5+0.93-0.6
x-2.8=3.7 0.7x+5×7=36.4
49999+4999+499+49+4