(填上合适的数并简便计算)
80×20%= 200×9%= 3.6×50%= 100×25%=
3.14×5= 5²×3.14= 2²×3.14= 3.14×9=
2÷0.25=
3.5÷70%=
8×12.5%=
0.33=
1.92÷0.04=
( ):10=6:5
①×65+0.75×34÷75%
②()×15×9
③
④86.4-(0.53+6.4)-147%
50%×2.5××64 32 × (+)
(1-75%)÷(1+) ÷[( -0.75)×60%]
验算