怎样算简便就怎样算3.35﹣1.1+0.75﹣1.9 4.2×9.9+0.42 (74﹣3.6)÷2.5÷4 307×10.1.
用竖式计算下面各题. 3.9×0.48= 1.25×0.37= 0.54×7.5=
连连看. 0.02×4 0.04×2 0.4×2 0.04+0.04 0.4+0.4 0.02+0.02+0.02+0.02.
2.3×0.3= 0.42×0.2= 3.5×0.2= 12×0.2= 1.8×0.5= 0.9×0.11= 1.22×0.4= 0.12×0.6= 0.02×500=
计算下面各题.(得数保留两位小数) 1.78×0.24≈ 0.56×1.07≈