7.8×6.3= 0.02×5.5≈(得數(shù)保留兩位小數(shù)))
19.76÷5.2=2 1÷1.4≈(得數(shù)保留一位小數(shù)))
4.8×0.98= 1.55÷3.8=
分析:根據(jù)小數(shù)乘除法的計算方法進(jìn)行解答,注意用四舍五入法保留小數(shù)位數(shù).
解答:解:(1)7.8×6.3=49.14


(2)0.02×5.5=0.11


(3)19.76÷5.2=3.8


(4)1÷1.4≈0.7


(5)4.8×0.98=4.704


(6)1.55÷3.8≈0.41
點(diǎn)評:考查了小數(shù)乘除法的筆算方法,根據(jù)其計算方法進(jìn)行計算;用四舍五入法保留相應(yīng)的小數(shù)位數(shù).
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