×= ×3.9= 12÷= ÷= +×=
48×= ÷= 1.5÷= ×= ×÷×=
×2.8 =
0.75+ =
=
0.25×23×4=
99×+× 99=
14.7-4.07=
4×÷4×=
+=
=
= = = =
= = 7π= =
×15= ×2= × = × =
÷ = ÷3= ÷5= ÷ =
①计算()×17× 12时可以用乘法分配律进行简算:②一个数乘假分数,积一定不小于这个数;③一台电视机先提价 , 再降价 , 则现价与原价一样:④若M×=N÷(M、N均不为0),则M> N。
1-0.29= 8.8÷0.2= + ×2
2.4×5= 3.2+7.8= 5÷ ×4=
96-69= 0.72+2.8= 0.125×0.8= 0.32÷0.1=
4× ÷4× = 7÷ = 1- =
403×19= -80%= ( - )×12=
12.5×0.8= 5-1 = 0.98×99+0.98= 7÷ ×7× =
÷ = × = 0.72÷0.6= 1.4× - ×1.4=