Question

12.5×20.4 12.5×9.6-1.25的简便运算

Answer 1

简便运算
12.5×20.4+12.5×9.6-1.25
=12.5×（20.4+9.6）-1.25
=12.5×40-1.25
=500-1.25
=498.75

Answer 2

解: 12.5×20.4 +12.5×9.6-1.25
=12.5(20.4+9.6)-1.25
=12.5*30-1.25
=375-1.25
=373.75

Answer 3

12.5×20.4 ＋12.5×9.6-1.25
＝12.5x(20.4+19.6)-1.25
=12.5x40-1.25
=500-1.25
=498.75

Answer 4

(1/6+1/9-1/12)÷4×9=1/6*9/4+1/9*9/4-1/12*9/4=3/8+1/4-3/16=（6+4-3）/16=7/163/20×3.4+5.6×0.15=0.15*（3.4+5.6）=0.15*（10-1）=0.15*10-0.15*1=1.5-0.15=1.352.5-(3/5+2.4÷8/3)=2.5-（0.6+0.9）=2.5-1.5=16/5/0.12+2.4*1/4=10+0.6=10.6和是10.64*4+8=24这个数是24

Answer 5

12.5×20.4+12.5×9.6-1.25
=12.5×（20.4+9.6）-1.25
=12.5×30-1.25
=375-1.25
=373.75