Question

5.63×12.1,用简便方法计算？

Answer 1

5.63×12.1
=5.63x11x1.1
=5.63x(10+1)x(1+0.1)
=5.63x(10+1+1+0.1)
=5.63x(10+2+0.1)
=56.3+11.26+0.563
=67.56+0.563
=68.123

Answer 2

原式等于5.63×（12+0.1）
=5.63×12+5.63×0.1
=67.56+0.563
=68.123

Answer 3

5.63*12.1
=5.63*11*1.1 巧算121=11*11
=61.93*1.1 利用乘以11的特点
=68.123