1.-2/3+(-5/6)-(-1/9)-1/6
1/6、1/3、1/2( )、5/6、1.
[5/6-(1/2-1/3)]×9/10
已知:1*6=1×2×3×4×5×6,6*6=6×7×8×9×10×11,计算(2*5)÷(6*6)?
(1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1)
(1)4 6 3 (2)6 9 4 (3)5 8 4 (4)10 15 6
1+2+3+4+5+6+7+8+9( )1×2×3×4×5×6×7×8×9×0.
根据数字猜成语 1,2,3,4,5,6,7( ) 1,3,5,7,9( ) 2,4,6,8,10( ) 1,2,5,6,
1.动脑筋计算:(1+1/2)*(1+1/4)*(1+1/6)*…* (1+1/10)*(1-1/3)*(1-1/5)*
数学计算题(3+5/9-2/3)×(1/6+1/9+1/12)-(1/6-1/9+1/12)×3+(1/6+1/9+1/
数字猜成语 1 2 3 4 5 6 0 9( ) 1 2 5 6 7 8 9( ) 1+2+3( ) 333 555(
6/7×5/9+4/9×6/7(简便计算) 0.8-(2/3+1/12)×8/9 5/6÷(6-5/12-7/12
(1/2-5/9+5/6)x(-36)