12709.44
25×(-4)=-25×4=-100,(-0.125)×(-8)=0.125×8=1.故答案为:-100,1.
0.1
计算: 2×√(1885×3.14) =2×√5918.9 = 2×76.93 =153.86
解: 8×5×1/3×3.14 =8x5x3.14÷3 =40x3.14÷3 =125.6÷3 =628÷15 =15分之628 ≈41.8667