口算．

⑴0.9+0.4=	⑵9﹣0.7=	⑶0.36+0.54=	⑷1﹣0.26=
⑸3.6+0.4=	⑹1.29﹣0.29=	⑺0.74+0.26=	⑻0.57﹣0.5=
⑼2.8+1.12=	⑽6.2+1.8=	⑾2.8﹣2.3=	⑿1.3﹣0.6=