初一数学、快点、①.(13x-11y+10z)-(15x+10y-15z)②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)] 要过程、至少2步
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![初一数学、快点、①.(13x-11y+10z)-(15x+10y-15z)②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)] 要过程、至少2步](/uploads/image/z/9315294-6-4.jpg?t=%E5%88%9D%E4%B8%80%E6%95%B0%E5%AD%A6%E3%80%81%E5%BF%AB%E7%82%B9%E3%80%81%E2%91%A0.%EF%BC%8813x-11y%2B10z%EF%BC%89-%EF%BC%8815x%2B10y-15z%EF%BC%89%E2%91%A1.2%EF%BC%883a%2B5b%EF%BC%89%2B3%EF%BC%885a-7b%EF%BC%89-1%2F2%EF%BC%882a-4b%EF%BC%89%E2%91%A2.1%2F2x-2%EF%BC%88-x-1%2F3y%5E2%EF%BC%89%2B2%EF%BC%88-3%2F4x%2B1%2F6y%5E2%EF%BC%89%E2%91%A3.3a%5E2b-%5B2ab-%EF%BC%882ab%5E2-a%5Ec%EF%BC%89-%EF%BC%88-2ab%5E2%2Ba%5E2c%EF%BC%89%5D+++++++++%E8%A6%81%E8%BF%87%E7%A8%8B%E3%80%81%E8%87%B3%E5%B0%912%E6%AD%A5)
初一数学、快点、①.(13x-11y+10z)-(15x+10y-15z)②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)] 要过程、至少2步
初一数学、快点、
①.(13x-11y+10z)-(15x+10y-15z)
②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)
③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)
④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)]
要过程、至少2步
初一数学、快点、①.(13x-11y+10z)-(15x+10y-15z)②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)] 要过程、至少2步
①.(13x-11y+10z)-(15x+10y-15z)
=13x-11y+10z-15x-10y+15z
=-2x-21y+25z
②.2(3a+5b)+3(5a-7b)-1/2(2a-4b)
=6a+10b+15a-21b-a+2b
=20a-9b
③.1/2x-2(-x-1/3y^2)+2(-3/4x+1/6y^2)
=1/2x+2x+2/3y^2-3/2x+1/3y^2
=x+y^2
④.3a^2b-[2ab-(2ab^2-a^c)-(-2ab^2+a^2c)]
=3a^2b-2ab+(2ab^2-a^c)+(-2ab^2+a^2c)
=3a^2b-2ab+2ab^2-a^c-2ab^2+a^2c
=3a^2b-2ab