1、口算: 0.2+0.3 3.5+2.4 8.7-4.5 1-0.6 0.9-0.5 2.3+5.4 4.9+1 8.6-5.5 0.7+0.8 6.7+1.1 5+6.5 9.7-7

2.、先说说下面各题的运算顺序,再计算. 7325-714+146-89 10000-(981-326)+148

=6611+146-89=6757-89=6668

=10000-655+148=9345+148=9493