125×456÷7.89÷4.56×78.9÷1.25用简便计算,还有7.48×369369-3.69×748748

125×456÷7.89÷4.56×78.9÷1.25
=(7.89/7.89)(125/1.25)(456/456)
=100000
7.48×369369-3.69×748748
=(7.48*100000)*(369369/100000)-(3.69*100000)*(748748/100000)
=0

125×456÷7.89÷4.56×78.9÷1.25
=125÷1.25×456÷4.56×78.9÷7.89
=100×100×10
=100000
7.48×369369-3.69×748748
=7.48×369×1001-369÷100×7.48×1001×100
=0