来自荣芳伟的问题
【快速口算.10×20=1-0.2=6.5+3.4=0.3+1.8=924×0=80×60=32×3=30×12=280÷4=0÷97=560÷8=640÷8=】
快速口算.
10×20=1-0.2=6.5+3.4=0.3+1.8=924×0=80×60=32×3=30×12=280÷4=0÷97=560÷8=640÷8=


【快速口算.10×20=1-0.2=6.5+3.4=0.3+1.8=924×0=80×60=32×3=30×12=280÷4=0÷97=560÷8=640÷8=】
快速口算.
10×20=1-0.2=6.5+3.4=0.3+1.8=924×0=80×60=32×3=30×12=280÷4=0÷97=560÷8=640÷8=
10×20=2001-0.2=0.86.5+3.4=9.90.3+1.8=2.1924×0=080×60=480032×3=9630×12=360280÷4=700÷97=0560÷8=70640÷8=80