Toán Lớp 7: Bỏ ngoặc rồi tính:
(-2,2+4,3)-(2,8-2,2+4,3)
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Toán Lớp 7: Bỏ ngoặc rồi tính:
(-2,2+4,3)-(2,8-2,2+4,3)
Comments ( 2 )
= $\text{- 2,2+4,3-2,8+2,2-4,3}$
= $\text{ (4,3-4,3)+(2,2-2,2)+2,8}$
= $\text{ 0+2,8}$
= $\text{ 2,8}$