先估一估,再用竖式计算.(1)20.88÷2.4=(2)0.15÷0.6=(3)7.68

先估一估,再用竖式计算.(1)20.88÷2.4=(2)0.15÷0.6=(3)7.68÷0.8=(4)3.36÷2.8=(5)1.107÷0.09=(6)0.832÷0.16=

(1)20.88÷2.4≈10,
(2)0.15÷0.6≈0.3
(3)7.68÷0.8≈7,
(4)3.36÷2.8≈1,
(5)1.107÷0.09≈11,
(6)0.832÷0.16≈4;
(1)20.88÷2.4=8.7,

(2)0.15÷0.6=0.25,

(3)7.68÷0.8=9.6,

(4)3.36÷2.8=1.2,

(5)1.107÷0.09=12.3,

(6)0.832÷0.16=5.2.
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