6.75+2.25= 1.02-0.6= 0.7÷0.01= 4.5+ =
2.5×12= 46×10%= + = 4-1÷3=
①475+390÷13-123
②270÷1.25÷0.8
③6.5÷ ×
④24×( + - )
⑤
⑥ ×47+52÷ +0.375
……