问题 解答题

计算下列个题:

(1)7.25+3.52+2.75+5.48             

(2)125×25×0.8×4

(3)24700-5278÷26×108                

(4)99999×77778+33333×66666.

答案

(1)7.25+3.52+2.75+5.48,

=(7.25+2.75)+(3.52+5.48),

=10+9,

=19;

          

(2)125×25×0.8×4,

=(125×0.8)×(25×4),

=100×100,

=10000;

(3)24700-5278÷26×108,

=24700-203×108,

=24700-21924,

=2776;

             

(4)99999×77778+33333×66666,

=9999×7778+(3333×3)×(6666÷3),

=9999×7778+9999×2222,

=9999×(7778+2222),

=9999×10000,

=99990000.

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