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合理灵活地计算:125×(73×8)25.23-7.85-1.15302×99+3027200÷4÷2525×32×12545×10225+75-25+75312×4+188×427.7+3.23+16.77+23.

题目详情
合理灵活地计算:
125×(73×8)

25.23-7.85-1.15

302×99+302
7200÷4÷25 25×32×125 45×102
25+75-25+75 312×4+188×4 27.7+3.23+16.77+23.
▼优质解答
答案和解析
(1)125×(73×8),
=125×8×73,
=1000×73,
=73000;

(2)25.23-7.85-1.15,
=25.23-(7.85+1.15),
=25.23-9,
=16.23;

(3)302×99+302,
=302×(99+1),
=302×100,
=30200;

(4)7200÷4÷25,
=7200÷(4×25),
=7200÷100,
=72;

(5)25×32×125,
=25×4×8×125,
=(25×4)×(8×125),
=100×1000,
=100000;

(6)45×102,
=45×(100+2),
=45×100+45×2,
=4500+90,
=4590;

(7)25+75-25+75,
=(25-25)+(75+75),
=0+150,
=150;

(8)312×4+188×4,
=(312+188)×4,
=500×4,
=2000;

(9)27.7+3.23+16.77+2.3,
=(27.7+2.3)+(3.23+16.77),
=30+20,
=50.