7.6÷0.97.6 0.8²0.8+0.8
4.7×0.290.47×2.9 4.35÷2.143.5÷21
180÷6= += ÷3= ×=
6﹣3.3= 2.2+3.57= ﹣= 39.5÷8≈(估算)
0.125×4= ×12= := 8×÷8×=