Question

列豎式計(jì)算．（加△號(hào)的結(jié)果保留一位小數(shù)，加☆號(hào)的結(jié)果保留兩位小數(shù)）
0.46×3.5=
0.54×1.35=
3.36×7.2=
83×0.29=
△4.7×1.35≈
☆9．O6×0.48≈

Answer 1

解：0.46×3.5=1.61

0.54×1.35=0.729

3.36×7.2=24.192

83×0.29=24.07

4.7×1.35=6.345≈6.3

9．O6×0.48=4.3488≈4.35

分析：根據(jù)小數(shù)的乘法豎式計(jì)算的方法進(jìn)行計(jì)算，再根據(jù)四舍五入法進(jìn)行保留相應(yīng)的小數(shù)位數(shù)即可．
點(diǎn)評(píng)：本題主要考查小數(shù)乘除法的筆算，根據(jù)各自的計(jì)算法則進(jìn)行計(jì)算即可；再根據(jù)四舍五入法進(jìn)行保留相應(yīng)的小數(shù)位數(shù)即可．