直接写出得数. 0.6×0.5= 1.6÷4= 0×7.17= 3.2﹣1.2=7.6+2.4= 0.05×100= 1﹣1×0.7= 2÷0.5=
简便运算. 1.25×0.25×0.05×64= ;0.525÷13.125÷4×85.2= ;+++= ;++++= .
36×72+36×27+36125×32×254.64﹣(0.64+3.62) 21÷9+22÷9+23÷9+24÷9199999.9+19999.8+1999.9+199.8+19.9+0.7.
321×3.3﹣123÷= 326 .
(7.5+7.5+7.5+7.5)×125×4.
1999+999×999.