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Toán Lớp 7: `(` $\dfrac{7}{15}$ `+` $\dfrac{4}{11}$ `)` `:` $\dfrac{3}{10}$ `+ (` $\dfrac{8}{15}$ `-` $\dfrac{15}{11}$ `) :` $\dfrac{3}{10}$

Home/ Toán Lớp 7: `(` $\dfrac{7}{15}$ `+` $\dfrac{4}{11}$ `)` `:` $\dfrac{3}{10}$ `+ (` $\dfrac{8}{15}$ `-` $\dfrac{15}{11}$ `) :` $\dfrac{3}{10}$

Toán Lớp 7: `(` $\dfrac{7}{15}$ `+` $\dfrac{4}{11}$ `)` `:` $\dfrac{3}{10}$ `+ (` $\dfrac{8}{15}$ `-` $\dfrac{15}{11}$ `) :` $\dfrac{3}{10}$

Bình Tháng Chín 12, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: ( $\dfrac{7}{15}$ + $\dfrac{4}{11}$ ) : $\dfrac{3}{10}$ + ( $\dfrac{8}{15}$ – $\dfrac{15}{11}$ ) : $\dfrac{3}{10}$

Comments ( 2 )

lanminhngoc
12 Tháng Chín, 2022 at 1:10 sáng

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( 7/{15} + 4/{11} ) : 3/{10} + ( 8/{15} – 15/{11} ) : 3/{10}

= ( 7/{15} + 8/{15} ) : 3/{10} + ( 4/{11} – 15/{11} ) : 3/{10}

= 1 : 3/{10} + ( -1) : 3/{10}

= [ 1 + (-1) ] : 3/{10}

= 0 : 3/{10}

= 0
thanoanghha
12 Tháng Chín, 2022 at 1:10 sáng

Reply

Giải đáp:

0

Lời giải và giải thích chi tiết:

( 7/15 + 4/11) : 3/10 + ( 8/15 – 15/11 ) : 3/10

= 7/15 + 4/11 : 3/10 + 8/15 – 15/11 : 3/10

=((7/15 + 8/15) + (4/11 – 15/11) ): 3/10

=((7/15 + 8/15) + (4/11 – 15/11) )/ \frac{3}{10}

=(1 + ?(-1))/\frac{3}{10}

=0 : 3/10

=0

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