15.6-4.6= 11.2+8= 0.55×2= ÷ =
25×0.8= 0.25÷ = - = 1.5+ =
①66-8=
②70-23=
③82-47=
④89-36+24=
⑤71-(28+35)=
⑥76-(51-23)=
14÷712÷6 2×449÷7 42÷67×1
35÷514÷2 7÷77×7 21÷320÷5