70×68+5×680
70×68+5×680
已知a=11×66+12×67+13×68+14×69+15×70÷11×65+12×66+13×67+14×68+15
13.68×5.7+13.68×5.3-13.68怎么样简算
计算:69*69/68*68*70*70(-2)
,68,69,70~216片
66,67,68,69,70,
67,68,70小题.
急求简便运算方法!24×125×5 170÷5÷2 31×102 1.25×3.2×2.5 68×99+68
用简便方法计算:35×68+68+68×64=
680乘以56加440乘以68用简便方法怎么算
680×56+440×68怎么简便运算?999×222+333×334怎么简便运算?
(-32)+68+(-29)+(-68)=