简便计算,1.12×(-3/5)+(-13)×3/52.4×(-5)-4×(7-5/4)+8/17×(-41/4)(-四又四分之一)3.(-24)×(1/2-1/3)×(-1/4)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/28 12:23:25
简便计算,1.12×(-3/5)+(-13)×3/52.4×(-5)-4×(7-5/4)+8/17×(-41/4)(-四又四分之一)3.(-24)×(1/2-1/3)×(-1/4)
简便计算,
1.12×(-3/5)+(-13)×3/5
2.4×(-5)-4×(7-5/4)+8/17×(-41/4)(-四又四分之一)
3.(-24)×(1/2-1/3)×(-1/4)
简便计算,1.12×(-3/5)+(-13)×3/52.4×(-5)-4×(7-5/4)+8/17×(-41/4)(-四又四分之一)3.(-24)×(1/2-1/3)×(-1/4)
1、12×(-3/5)+(-13)×3/5=(-25)×3/5=-15
2、4×(-5)-4×(7-5/4)+8/17×(-41/4)
=-20-28+5+8/17 * (-17/4)
=-45
3、 (-24)×(1/2-1/3)×(-1/4)
=6*(1/6)=1
1. 12×(-3/5)+(-13)×3/5
=(-12-13)×3/5
=-25×3/5
=-15
2. 4×(-5)-4×(7-5/4)+8/17×(-41/4)
=4×(-5)-4×(7-...
全部展开
1. 12×(-3/5)+(-13)×3/5
=(-12-13)×3/5
=-25×3/5
=-15
2. 4×(-5)-4×(7-5/4)+8/17×(-41/4)
=4×(-5)-4×(7-5/4)+8/17×(-17/4)
=4×(-5)-(4×7-4×5/4)-2
=-20-(28-5)-2
=-20-23-2
=-45
3. (-24)×(1/2-1/3)×(-1/4)
=(-24)×(-1/4)×( 1/2-1/3)
=6×(1/2-1/3)
=6×1/2-6×1/3
=3-2
=1
收起
这些题目都是提取公因式来计算。
1、 12×(-3/5)+(-13)×3/5
=(-12-13)×3/5
=(-25)×3/5
=-15
2、4×(-5)-4×(7-5/4)+8/17×(-41/4)
=4×<-5-7+5/4+2/17×(-17/4)>
=4×(-12+5/4-1/2)
=-48+5-2...
全部展开
这些题目都是提取公因式来计算。
1、 12×(-3/5)+(-13)×3/5
=(-12-13)×3/5
=(-25)×3/5
=-15
2、4×(-5)-4×(7-5/4)+8/17×(-41/4)
=4×<-5-7+5/4+2/17×(-17/4)>
=4×(-12+5/4-1/2)
=-48+5-2
--45
3、(-24)×(1/2-1/3)×(-1/4)
=24×(1/6)×(-1/4)
=-1
收起