问题 解答题
估算
①59.9÷3.1≈②2.92×8.1≈③11.9÷6.1≈
④03÷0.39≈⑤4.83÷0.21≈⑥4.8×0.49≈
答案

(1)59.9÷3.1,

≈60÷3,

=20;

(2)2.92×8.1,

≈3×8,

=24;

(3)11.9÷6.1,

≈12÷6,

=2;

(4)0.3÷0.39,

≈0.3÷0.4,

=

3
4

(5)4.83÷0.21,

≈5÷0.2,

=25;

(6)4.8×0.49,

≈5×0.5,

=0.25.

单项选择题
单项选择题