276×543-267÷276+543×275

问题描述:

276×543-267÷276+543×275

276×543-267÷276+543×275 =(275+1)×543-1+543×275=275×543+543-1+543×275=543×(275+275)+542=543×550+542=543×(500+50)+542=543×500+543×50+542=271500+27150+542=299192