5.05x2.02
=5.05x2x1.01(乘法结合律)
=10.1x1+10.1x0.01(乘法分配律)
=10.1+0.101
=10.201
扩展资料:
简算常用公式
加法:a+b=b+a(加法交换律)
a+b+c=a+(b+c) (加法结合律)
a+99=a+(100-1)(近似数)
乘法:a×b=b×a(乘法交换律)
a×b×c=a×(b×c)(乘法结合律)
(a+b)×c=a×c+b×c(乘法分配律)
(a-b)×c=a×c-b×c(乘法分配律变化式)
(a+b+d)×c=a×c+b×c+d×c(乘法分配律变化式)
a×c+c=(a+1)×c(乘法分配律变化式)
5.05×2.02简便计算
=5*2+5*0.02+0.05*2+0.05*0.02
=10+0.1+0.1+0.001
=10.201
5.05x2.02
=5.05x2x1.01
=10.1x1+10.1x0.01
=10.1+0.101
=10.201
=5.05×(2+0.02)
=5.05×2+5.05×0.02
=10.1+0.101
=10.201
=(5+0.05)x(2+0.02)
=5x2+5x0.02+0.05x2+0.05x0.02
=10+0.1+0.1+0.001
=10.201