2.1-2.01= 3.07+0.125= 0.35×0.4=
0.85×100= 1.25×4= 4-0.89=
0.2×0.5+1.3= 3.75-0.75-3=
3.1×0.03= 0.02÷100= 6-5×0.7=
(0.5+0.25)×4= 30-3.75= 19.9×2.1≈
16.9-3.02-6.9= 2.5-2.5×0.4-0.4=