2.5×1.25×32
3.6×3.6+3.6×6.40
×12
①4+0.7x=102
②
③7:x=2.3:6.9
①0.25×16.2×4
②375+450÷18×25
③35.6- +34.4-
④ × + ÷
⑤[( - )× ]÷
⑥3.5× +5.5×80%+0.8