Question

9.6×O.8=

1.5×2.8=

1.87×2.5=

0.57×0.06=

Answer 1

分析：小數(shù)乘法的計(jì)算方法：按照整數(shù)乘法的法則算出積，再看因數(shù)中一共有幾位小數(shù)，就從得數(shù)的右邊起數(shù)出幾位，點(diǎn)上小數(shù)點(diǎn)；得數(shù)的小數(shù)部分末尾有0，一般要把0去掉進(jìn)行化簡(jiǎn)；據(jù)此計(jì)算得解．

解答：解：9.6×O.8=7.68，


1.5×2.8=4.2，


1.87×2.5=4.675，


0.57×0.06=0.0342．

點(diǎn)評(píng)：此題考查小數(shù)乘法的計(jì)算方法的靈活運(yùn)用，要注意積的小數(shù)位數(shù)等于兩個(gè)因數(shù)的小數(shù)位數(shù)之和．