【单选题】Job ()(满意) can add to my feeling of happiness, though I have to work extra hours.
【简答题】直接填得数. 2.5× 2 3 ×0.4= 3.9÷10%= 1 7 ÷ 2 7 = 9× 1 8 ÷9× 1 8 = 7-6÷ 6 7 = 125%×8= 99 2 +99= 5-1 2 5 -0.6=
【简答题】下面各题,能简算的要简算. (1)30.1-16.8÷3.5×6.2 (2)27×99 (3) 5 4 ×2.5× 4 5 ×0.4 (4) 7 23 ÷8+ 7 23 × 7 8 (5)15× 1 7 ×( 2 3 × 7 10 ) (6) 8 9 ÷[( 4 6 - 1 3 )÷ 1 2 ].
【简答题】5×40= 18×60= 1.73+2.07= 10-0.9= 400÷0.4= 1 2 + 1 2 = 2 3 - 1 3 = 1 5 + 1 4 = 3 4 - 1 2 = 1 6 - 1 7 =
【简答题】1 mol.L -1 的醋酸溶液 (K a =1.8×10 -5),其解离度为多少?
【简答题】计算下面各题,能简算的要简算. (1)( 1 5 + 1 3 )×15 (2) 4 7 × 5 9 + 3 7 × 5 9 (3) 1 3 × 5 16 × 3 5 (4)2.5×97×0.4 (5)1.25×97×8 (6)1.25×32×2.5×97 (7)0.36×101 (8)0.36×98 (9) 5 7 - 5 9 × 5 7 (10) 2 9 + 7 16 × 2 9 (11) 1 ...
【简答题】直接写得数. 0.38+1.02= 4 5 -0.4= 3 8 × 8 27 = 3.5× 4 5 = 6.4÷0.8= 3÷ 1 3 = 90×10%= 1 2 ÷25%= 1÷ 1 7 = 1+80%= 1.25×8= 1÷3= 2.5×4÷1000= 11 8 × 8 11 =