1. 口算

0.46﹣0.06=       3.7+4.3=          1+0.55=              4.6﹣1.8=

0.65+0.32=         10﹣9.9=          4+0.92=               4.1﹣1.1=

0.05+0.5=            7.2+1.8=         1.7+0.37=              6.6﹣6=