问题 解答题
用简便方法计算
①2.6+6.92+3.4+0.08

②3200÷4÷5

③8.8-4.3-3.7
④312×4+188×4⑤32×125×25⑥2.43-(0.28+1.43)
答案

①2.6+6.92+3.4+0.08,

=(2.6+3.4)+(6.92+0.08),

=6+7,

=13;

②3200÷4÷5,

=3200÷(4×5),

=3200÷20,

=160;

③8.8-4.3-3.7,

=8.8-(4.3+3.7),

=8.8-8,

=0.8;

④312×4+188×4,

=4×(312+188),

=4×500,

=2000;

⑤32×125×25,

=(4×25)×(125×8),

=100×1000,

=100000;

⑥2.43-(0.28+1.43),

=2.43-1.43-0.28,

=1-0.28,

=0.72.

单项选择题
单项选择题