递等式计算.(能简算的要简算)以下三题,4/9÷10/7+5/9×7/10 1/12+3/4×2/3÷2 (1/2-5/11)×(5/9+2/13)
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![递等式计算.(能简算的要简算)以下三题,4/9÷10/7+5/9×7/10 1/12+3/4×2/3÷2 (1/2-5/11)×(5/9+2/13)](/uploads/image/z/659122-34-2.jpg?t=%E9%80%92%E7%AD%89%E5%BC%8F%E8%AE%A1%E7%AE%97.%EF%BC%88%E8%83%BD%E7%AE%80%E7%AE%97%E7%9A%84%E8%A6%81%E7%AE%80%E7%AE%97%EF%BC%89%E4%BB%A5%E4%B8%8B%E4%B8%89%E9%A2%98%2C4%2F9%C3%B710%2F7%EF%BC%8B5%2F9%C3%977%2F10+1%2F12%EF%BC%8B3%2F4%C3%972%2F3%C3%B72+%EF%BC%881%2F2%EF%BC%8D5%2F11%EF%BC%89%C3%97%EF%BC%885%2F9%EF%BC%8B2%2F13%EF%BC%89)
递等式计算.(能简算的要简算)以下三题,4/9÷10/7+5/9×7/10 1/12+3/4×2/3÷2 (1/2-5/11)×(5/9+2/13)
递等式计算.(能简算的要简算)以下三题,
4/9÷10/7+5/9×7/10 1/12+3/4×2/3÷2 (1/2-5/11)×(5/9+2/13)
递等式计算.(能简算的要简算)以下三题,4/9÷10/7+5/9×7/10 1/12+3/4×2/3÷2 (1/2-5/11)×(5/9+2/13)
4/9÷10/7+5/9×7/10
=(4/9+5/9)×7/10
=1×7/10
=7/10
1/12+3/4×2/3÷2
= 1/12+3/12
=4/12
=1/3
(1/2-5/11)×(5/9+2/13)
=1/22*83/117
=83/2574