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Toán Lớp 7: (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7)

Home/ Toán Lớp 7: (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7)

Toán Lớp 7: (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7)

Khánh Ngân Tháng Một 28, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: (8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7)

Comments ( 2 )

huyenmi76
28 Tháng Một, 2023 at 6:49 chiều

Reply

(8-9/4+2/7)-(-6-3/7+5/4)-(3+2/4-9/7)

= 8 – 9/4 + 2/7 + 6 + 3/7 – 5/4 – 3 – 2/4 + 9/7

= (8+6-3) + (- 9/4 – 5/4 – 2/4) + (2/7 + 3/7 + 9/7)

= 11 + (-16/4) + 14/7

= 11 + (-4) + 2

= 9

(Chúc bạn học tốt)
tuenhioanh
28 Tháng Một, 2023 at 6:49 chiều

Reply

(8 – $\dfrac{9}{4}$ + $\dfrac{2}{7}$ ) – (-6 – $\dfrac{3}{7}$ + $\dfrac{5}{4}$ ) – (3 + $\dfrac{2}{4}$ – $\dfrac{9}{7}$ )

= 8 – $\dfrac{9}{4}$ + $\dfrac{2}{7}$ + 6 + $\dfrac{3}{7}$ – $\dfrac{5}{4}$ – 3 – $\dfrac{2}{4}$ + $\dfrac{9}{7}$

= ( 8 + 6 – 3) + (- $\dfrac{9}{4}$ – $\dfrac{5}{4}$ – $\dfrac{2}{4}$ ) + ( $\dfrac{2}{7}$ +$\dfrac{3}{7}$ + $\dfrac{9}{7}$ )

= 11 – $\dfrac{16}{4}$ + $\dfrac{14}{7}$

= 11 – 4 + 2

= 9

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