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TL:
\(\text{567 x 23 + 433 x 23}\)
\(=\left(567+433\right) x 23\)
\(=1000x 23\)
\(=23000\)
HT
TL
\(\frac{7}{8}\)+\(\frac{4}{23}\)+\(\frac{42}{23}\)=\(\frac{7}{8}+2\)=\(\frac{23}{8}\)
nha bn
HT
\(TL:\)
\(\frac{7}{8}+\frac{4}{23}+\frac{42}{23}\)
\(=\frac{7}{8}+\left(\frac{4}{23}+\frac{42}{23}\right)\)
\(=\frac{7}{8}+\frac{46}{23}\)
\(=\frac{7}{8}+2\)
\(=\frac{7}{8}+\frac{16}{8}\)
\(=\frac{23}{8}\)
\(=2\frac{7}{8}\)
\(HT!\)
\(\frac{19}{15}+\frac{31}{23}-\frac{4}{15}-\frac{8}{23}=\frac{19-4}{15}+\frac{31-8}{23}=\frac{15}{15}+\frac{23}{23}=1+1=2\)
\(\frac{19}{15}+\frac{31}{23}-\frac{4}{15}-\frac{8}{23}\)
\(=\frac{19-4}{15}+\frac{31-8}{23}\)
\(=\frac{15}{15}+\frac{23}{23}\)
\(=1+1=2\)
23 x 27 - 46 x 13 = 23 x 27 - 23 x 26
= 23 x ( 27 - 26 )
= 23 x 1
= 23
chúc bạn học tốt !
215 x 123 - 125 x 23
= 123 x ( 215 - 125 )
= 123 x 90
= 123 x 9 x 10
= 1230 x 9
= 11070
Cấm ai k
215 x 123 - 125 x 23
= 215 x 123 - 125 x 123 - 125 x 100
= 123 x ( 215 - 125 ) - 125 x 100
= 123 x 90 - 125 x 100
= 11070 - 12500
= -1430
\(\dfrac{11}{34}+\dfrac{5}{23}+\dfrac{23}{34}+\dfrac{18}{23}\)
\(=\left(\dfrac{11}{34}+\dfrac{23}{34}\right)+\left(\dfrac{5}{23}+\dfrac{18}{23}\right)\)
\(=1+1\)
\(=2\)
#DatNe
566 x 23 + 466 x 23 + 23
= ( 566 + 466 + 1 ) x 23
= 1033 x 23
= ( 1000 x 23) + (30 x 23) + (3 x 23)
= 23000 + 690 + 69 = 23759
lưu ý: 23:23=1
566x23+433x23+23
=566x23+433x23+1x23
=(566 +433 + 23)x23
=1000 x 23
=23000