Question

0.36×7.5+0.036×25的简便运算

0.36×7.5+0.036×25的简便运算

Answer 1

0.36×7.5+0.036×25=3.6

0.36×7.5+0.036×25的简便运算：

=0.36x7.5+0.36x2.5

=0.36x(7.5+2.5) 乘法分配律

=0.36x10

=3.6

扩展资料

乘法：分配律=ac+ab=a(b+c)

结合律=abc=a(bc)

交换律=ab=ac

积不变性质=ab=(a÷c)×(bc)(c≠0)

加法：结合律=a+b+c=a+(b+c)

交换律=a+b=b+a

除法：a÷b÷c=a÷（b×c）(b≠0,c≠0)

商不变性质=a÷b=(a×d)÷(b×d)(b≠0,d≠0)=(a÷d)÷(b÷d)(b≠0,d≠0)

减法：a-b-c=a-(b+c)

Answer 2

0.36×7.5+0.036×25的简便运算
解：
=0.36x7.5+0.36x2.5
=0.36x(7.5+2.5) 乘法分配律
=0.36x10
=3.6
祝学习进步。

Answer 3

0.36×7.5+0.036×25

=2.5x(0.36x3+0.36)
=2.5x0.36x4
=(2.5x4)x0.36
=10x0.36
=3.6

Answer 4

解:原式=0.36x7.5+0.36x2.5
=0.36x（7.5+2.5）
=0.36x10=3.6