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=
20×(+)
0.868÷(3.15-1.75)
4.13×2.3+4. 13×7.7
(1)1-0.47= (2)6.4-4=(3)0.25×12= (4)(5) (6)(7)0.88÷2.2= (8)0.08×0.5=(9) (10)72.1×1000=