怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)27a÷9= (8)21x-7x-7a
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![怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)27a÷9= (8)21x-7x-7a](/uploads/image/z/6890810-50-0.jpg?t=%E6%80%8E%E4%B9%88%E5%86%99%3F%EF%BC%881%EF%BC%894x%2B9x%3D+%EF%BC%882%EF%BC%897.8x%2B2.2x-x%3D+%EF%BC%883%EF%BC%898a-8a%3D+%EF%BC%884%EF%BC%892a%2B4a-3a%3D+%EF%BC%885%EF%BC%893a%C3%976%3D+%EF%BC%886%EF%BC%894m%2B8m-5n%3D+%EF%BC%887%EF%BC%89%E6%80%8E%E4%B9%88%E5%86%99%3F%EF%BC%881%EF%BC%894x%2B9x%3D+%EF%BC%882%EF%BC%897.8x%2B2.2x-x%3D+%EF%BC%883%EF%BC%898a-8a%3D+%EF%BC%884%EF%BC%892a%2B4a-3a%3D+%EF%BC%885%EF%BC%893a%C3%976%3D+%EF%BC%886%EF%BC%894m%2B8m-5n%3D+%EF%BC%887%EF%BC%8927a%C3%B79%3D+%EF%BC%888%EF%BC%8921x-7x-7a)
怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)27a÷9= (8)21x-7x-7a
怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)
怎么写?
(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)27a÷9= (8)21x-7x-7a= (9)2乘x乘5= (10)b-0.24b+a=
怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)怎么写?(1)4x+9x= (2)7.8x+2.2x-x= (3)8a-8a= (4)2a+4a-3a= (5)3a×6= (6)4m+8m-5n= (7)27a÷9= (8)21x-7x-7a
(1)4x+9x=13x
(2)7.8x+2.2x-x= 9x
(3)8a-8a=0
(4)2a+4a-3a=3a
(5)3a×6=18a
(6)4m+8m-5n=12m-5n
(7)27a÷9= 3a
(8)21x-7x-7a=14x-7a
(9)2乘x乘5=10x
(10)b-0.24b+a=0.76b+a
1)=13x
2)=(7.8+2.2-1)x=9x
3)=0
4)=(2+4-3)a=3a
5)=18a
6)=(4+8)m-5n=12m-5n
7)=3a
8)=14x-7a
9)=10x
10)=0.76b+a