17．整理与练习（2） 1. 0.6 0.6 21 103 30 2.4 2.
3. ＜ ＜ ＞ ＞ ＜ ＝ 3. 7.98+2.96+1.02 =7.98+1.02 +2.96 =9+2.96 =11.96 5.95÷﹙1.2+0.5﹚×5 =5.95÷1.7×5 =3.5×5 =17.5 6.32×0.9+6.32×0.1 =6.32×（0.9+0.1） =6.32×1 =6.32 5.4×[﹙1.3+2.15﹚÷0.5] =5.4×[3.45÷0.5] =5.4×6.9 =37.26 |
