计算下面各题,能简算的要简算. 0.89×100.1 146.5-(23+46.5) 5.83×2+5.83×8 45.9÷8÷0.125.
(1)0.89×100.1, =0.89×(100+0.1), =89+0.089, =89.089; (2)146.5-(23+46.5), =146.5-23-46.5, =146.5-46.5-23, =100-23, =77; (3)5.83×2+5.83×8, =5.83×(2+8), =5.83×10, =58.3; (4)45.9÷8÷0.125, =45.9÷(8×0.125), =45.9÷1, =45.9. |