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)
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![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)](/uploads/image/z/7636721-41-1.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C1.12%C3%97%EF%BC%88-3%2F5%EF%BC%89%2B%EF%BC%88-13%EF%BC%89%C3%973%2F52.4%C3%97%EF%BC%88-5%EF%BC%89-4%C3%97%EF%BC%887-5%2F4%EF%BC%89%2B8%2F17%C3%97%EF%BC%88-41%2F4%EF%BC%89%EF%BC%88%EF%BC%8D%E5%9B%9B%E5%8F%88%E5%9B%9B%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%893.%EF%BC%88-24%EF%BC%89%C3%97%EF%BC%881%2F2-1%2F3%EF%BC%89%C3%97%EF%BC%88-1%2F4%EF%BC%89)
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-...
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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...
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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