问题
解答题
脱式计算
25×(8+4)
0.25+3.64+1.75+6.36
360÷2.5÷4
25×12-12×5.
答案
(1)25×(8+4),
=25×12,
=25×4×3,
=100×3,
=300;
(2)0.25+3.64+1.75+6.36,
=(0.25+1.75)+(6.36+3.64),
=2+10,
=12;
(3)360÷2.5÷4,
=360÷(2.5×4),
=360÷10,
=36;
(4)25×12-12×5,
=(25-5)×12,
=20×12,
=240.