Question

\(A=10-1\frac{1}{6}x\frac{6}{7}\)

\(B=21:\frac{11}{2}+5\frac{2}{11}\)

a,Tính A

b,Tính B

c,Tính A x B

d,Tính A : B

Answer 1

a) \(A=10-1\frac{1}{6}.\frac{6}{7}\)

\(=10-\frac{7}{6}.\frac{6}{7}\)

\(=10-1=9\)

b) \(B=21:\frac{11}{2}+5\frac{2}{11}\)

\(=\frac{42}{11}+\frac{57}{11}=9\)

c) \(A=9;B=9\)

\(A.B=9.9=81\)

d) \(A=9;B=9\)

\(A:B=9:9=1\)

Answer 2

a) A = \(10-1\frac{1}{6}\times\frac{6}{7}\)= \(10-\frac{7}{6}\times\frac{6}{7}\)= 10 - 1 = 9

b) B = \(21:\frac{11}{2}+5\frac{2}{11}\)= \(\frac{42}{11}+\frac{57}{11}\)= 9

c) A x B = 9 x 9 = 81

c) A : B = 9 : 9 = 1

Answer 3

\(A=10-1\frac{1}{6}\times\frac{6}{7}\)

\(A=10-\frac{7}{6}\times\frac{6}{7}\)

\(A=10-1\)

\(A=9\)

\(B=21:\frac{11}{2}+5\frac{2}{11}\)

\(B=21\times\frac{2}{11}+5+\frac{2}{11}\)

\(B=\frac{2}{11}\times\left(21+1\right)+5\)

\(B=\frac{2}{11}\times22+5\)

\(B=4+5\)

\(B=9\)

\(\Rightarrow A\times B=9\times9=81\)

      \(A:B=9:9=1\)

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Answer 4

\(a,A=10-1\frac{1}{6}\times\frac{6}{7}\)

\(A=10-\frac{7}{6}\times\frac{6}{7}\)

\(A=10-1\)

\(A=9\)

\(b,B=21\div\frac{11}{2}+5\frac{2}{11}\)

\(B=21\times\frac{2}{11}+5+\frac{2}{11}\)

\(B=21\times\frac{2}{11}+5+\frac{2}{11}\times1\)

\(B=\frac{2}{11}\times\left(21+1\right)+5\)

\(B=4+5\)

\(B=9\)

\(c,A\times B=9\times9=81\)

\(d,A\div b=9\div9=1\)