小升初数学简便计算3道,49又7/8*(-4)1/5*(-75又5/6)(-9又24/25)*(-125)(-2006)*2004/2005
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 14:14:15
![小升初数学简便计算3道,49又7/8*(-4)1/5*(-75又5/6)(-9又24/25)*(-125)(-2006)*2004/2005](/uploads/image/z/8734182-6-2.jpg?t=%E5%B0%8F%E5%8D%87%E5%88%9D%E6%95%B0%E5%AD%A6%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%973%E9%81%93%2C49%E5%8F%887%2F8%2A%EF%BC%88-4%EF%BC%891%2F5%2A%EF%BC%88-75%E5%8F%885%2F6%EF%BC%89%28-9%E5%8F%8824%2F25%29%2A%28-125%29%28-2006%29%2A2004%2F2005)
小升初数学简便计算3道,49又7/8*(-4)1/5*(-75又5/6)(-9又24/25)*(-125)(-2006)*2004/2005
小升初数学简便计算3道,
49又7/8*(-4)
1/5*(-75又5/6)
(-9又24/25)*(-125)
(-2006)*2004/2005
小升初数学简便计算3道,49又7/8*(-4)1/5*(-75又5/6)(-9又24/25)*(-125)(-2006)*2004/2005
49又7/8*(-4)
=(50-1/8)*(-4)
=-200+1/2
=-199.5
1/5*(-75又5/6)
=1/5*(-75-5/6)
=-25-1/6
=-25又1/6
(-9又24/25)*(-125)
=(-10+1/25)*(-125))
=1250-5
=1245
1、(50-1/8)×(-4)
=-200+0.5
=-199.5
2、1/5×(-75-5/6)
=-15-1/6
=-91/6
3、(-10+1/25)×(-125)
=1250-5
=1245
1、=49*(-4)+7/8*(-4)=(-196)+(-7/2)=-199又1/2
2、=1/5*(-75)+1/5*(-5/6)=-15 +(-1/6)=-15又1/6
3、=-9*(-125)+(-24/25)*(-125)=9*125+24/25*125=1125+120=1245