❶ 56X51十56X49怎样简便计算
56X51十码枯塌迟圆败野56X49
=56*(51+49)
=56*100
=5600
❷ 56十56x49简便方法计算
56+56x49=56x（49+1）=56x50=56x100/2=5600/2=2800
❸ 56十56x49简便方法计算
56+56*49=（49+1）*56=50*56=2800