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脱式计算,能简算的可以简算49×102-2×49125×76×88.33-2.43-4.57103×3236×99+3641000÷8÷125(39+21)×(84÷7)550+230×62÷31(324-285)×12÷26.

题目详情
脱式计算,能简算的可以简算
49×102-2×49        
125×76×8          
8.33-2.43-4.57 103×32               
36×99+36            41000÷8÷125
(39+21)×(84÷7) 550+230×62÷31    
(324-285)×12÷26.
▼优质解答
答案和解析
(1)49×102-2×49
=49×(102-2)
=49×100
=4900;

(2)125×76×8
=125×8×76
=1000×76
=76000;

(3)8.33-2.43-4.57
=8.33-(2.43+4.57)
=8.33-7
=1.33;

(4)103×32
=(100+3)×32
=100×32+3×32
=3200+96
=3296;

(5)36×99+36
=36×(99+1)
=36×100
=3600;

(6)41000÷8÷125
=41000÷(8×125)
=41000÷1000,
=41;

(7)(39+21)×(84÷7)
=60×12
=720;

(8)550+230×62÷31
=550+230×(62÷31)
=550+230×2
=550+460
=1010;

(9)(324-285)×12÷26
=39×12÷26
=468÷26
=18.