47+33= 800-140= 700-320= 86-44=
550+360= 77-35= 302+298= 760-260=
- = + = 1- = + + =
÷= ×= 1.02﹣0.43= 597×8≈
126÷3= 0.25×0.8= 1÷25%= 725÷92≈