5+5+7+09+86+1000000000000000000000000000
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1+2+3+100000000000000000000000000=700000000000000000000000000
86:9= 9 (dư 5)
65:7= 9 (dư 2)
43:5= 8 (dư 3)
86:7= 12 (dư 2)
65:5= 13
43:3=14 (dư 1)
76:7= 10(dư 6)
87:6= 14 (dư 3)
65:5= 13
86/9=9(dư 5)
65/7=9(dư 2)
43/5=8(dư 3)
86/7=12(dư 2)
65/5=13
43/3=12(dư 1)
76/7=10(dư 6)
87/6=14(dư 3)
65/5=13
\(\dfrac{2}{5}+\dfrac{4}{5}:4=\dfrac{2}{5}+\dfrac{1}{5}=\dfrac{3}{5}\)
\(\dfrac{3}{8}\times\dfrac{7}{4}-\dfrac{3}{8}=\dfrac{3}{8}\left(\dfrac{7}{4}-1\right)=\dfrac{3}{8}\times\dfrac{3}{4}=\dfrac{9}{32}\)
\(\dfrac{6}{5}-3:\dfrac{15}{4}=\dfrac{6}{5}-\dfrac{4}{5}=\dfrac{2}{5}\)
\(=\dfrac{2}{5}+\dfrac{4}{5}\times\dfrac{1}{4}\\ =\dfrac{2}{5}+\dfrac{1}{5}\\ =\dfrac{3}{5}\\ \\ =\dfrac{3}{8}\times\dfrac{7}{4}-\dfrac{3}{8}\times1\\ =\dfrac{3}{8}\times\left(\dfrac{7}{4}-1\right)\\ =\dfrac{3}{8}\times\dfrac{3}{4}\\ =\dfrac{9}{32}\\\\ =\dfrac{6}{5}-3\times\dfrac{4}{15}\\ =\dfrac{6}{5}-\dfrac{4}{5}\\ =\dfrac{2}{5}\)
Câu 1: A
Câu 2: D
Câu 3: C
Câu 4:A
Câu 5: B
Câu 6: C
Câu 7: A
Câu 8: B
Câu 9: C
Câu 10:A
K mk nha!
7 + 9 + 7 + 9 + 5 + 2 + 86 + 569 + 5896 + 586 + 586 = 7762
\(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{42}\\{\,\,\,5}\end{array}}\\\hline{\,\,\,\,37}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{51}\\{\,\,\,9}\end{array}}\\\hline{\,\,\,\,42}\end{array}\)
\(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{63}\\{\,\,7}\end{array}}\\\hline{\,\,\,56}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{86}\\{\,\,8}\end{array}}\\\hline{\,\,\,78}\end{array}\)
1000000000000000000000000112
5+5+7+09+86+1000000000000000000000000000=10000000000112