1 8.7%×2.5+7.5×0.087 所有的能简算的要简算 2 (7/9+4/15-3/5)×4 3 80%÷[62.5%×(1-20%)]4 5/6÷5/12+7/15×3/75 25%×3.7+7.3×1/4-25%6 (50%-37.5%)÷75%
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 02:59:25
![1 8.7%×2.5+7.5×0.087 所有的能简算的要简算 2 (7/9+4/15-3/5)×4 3 80%÷[62.5%×(1-20%)]4 5/6÷5/12+7/15×3/75 25%×3.7+7.3×1/4-25%6 (50%-37.5%)÷75%](/uploads/image/z/441428-68-8.jpg?t=1+8.7%EF%BC%85%C3%972.5%2B7.5%C3%970.087+%E6%89%80%E6%9C%89%E7%9A%84%E8%83%BD%E7%AE%80%E7%AE%97%E7%9A%84%E8%A6%81%E7%AE%80%E7%AE%97+2+%EF%BC%887%2F9%2B4%2F15-3%2F5%29%C3%974+3+80%EF%BC%85%C3%B7%5B62.5%25%C3%97%EF%BC%881-20%25%EF%BC%89%5D4+5%2F6%C3%B75%2F12%2B7%2F15%C3%973%2F75+25%25%C3%973.7%2B7.3%C3%971%2F4-25%256+%EF%BC%8850%EF%BC%85-37.5%25%EF%BC%89%C3%B775%25)
1 8.7%×2.5+7.5×0.087 所有的能简算的要简算 2 (7/9+4/15-3/5)×4 3 80%÷[62.5%×(1-20%)]4 5/6÷5/12+7/15×3/75 25%×3.7+7.3×1/4-25%6 (50%-37.5%)÷75%
1 8.7%×2.5+7.5×0.087 所有的能简算的要简算 2 (7/9+4/15-3/5)×4 3 80%÷[62.5%×(1-20%)]
4 5/6÷5/12+7/15×3/7
5 25%×3.7+7.3×1/4-25%
6 (50%-37.5%)÷75%
1 8.7%×2.5+7.5×0.087 所有的能简算的要简算 2 (7/9+4/15-3/5)×4 3 80%÷[62.5%×(1-20%)]4 5/6÷5/12+7/15×3/75 25%×3.7+7.3×1/4-25%6 (50%-37.5%)÷75%
1 8.7%×2.5+7.5×0.087
=0.087x(2.5+7.5)
=0.087x10
=0.87
2 (7/9+4/15-3/5)×4
=(35/45+12/45-27/45)x4
=4/9x4
=16/9
3 80%÷[62.5%×(1-20%)]
=0.8÷(0.625x0.8)
=0.8÷0.5
=1.6
4 5/6÷5/12+7/15×3/7
=2+1/5
=2.2
5 25%×3.7+7.3×1/4-25%
=0.25x(3.7+7.3-1)
=0.25x10
=2.5
6 (50%-37.5%)÷75%
=0.125÷0.75
=1/8÷3/4
=1/6
1.原式= (2.5+7.5)* 0.087 =0.87
2.原式= [7/9+(4/15-3/5)]* 4 = (7/9-1/3)*4 = 4/9*4 =16/9
3.原式=80%÷(1-20%)÷62.5% =1/0.625=8/5
4.原式=5/6*12/5 + 1/5 =11/5
5.原式= 0.25* (3.7+7.3-1) =2.5
6.原式=0.5/0.75 -0.375/0.75 = 2/3 -1/2 =1/6
1 8.7%×2.5+7.5×0.087=0.087×2.5+7.5×0.087=0.087*(2.5+7.5)=0.87
2 (7/9+4/15-3/5)×4 先算4/15-3/5 或者直接硬算
3 80%÷[62.5%×(1-20%)] =80%÷[62.5%×0.8】=62.5%
4硬算
5先减后加同1
6硬算
伙计,要记公式啊.