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a. $\dfrac{14}{15}+\dfrac{2}{11}+\dfrac{1}{15}+\dfrac{4}{11}+\dfrac{10}{22}$
$=(\dfrac{14}{15}+dfrac{1}{15})+(\dfrac{2}{11}+\dfrac{4}{11}+\dfrac{10}{22})$
$=1+1=2$
b. $74\times43-43+27\times43$
$=(74-1+27)\times43$
$=100\times43=4300$
\(a)\dfrac{14}{15}+\dfrac{2}{11}+\dfrac{1}{15}+\dfrac{4}{11}+\dfrac{10}{22}\)
\(=\left(\dfrac{14}{15}+\dfrac{1}{15}\right)+\dfrac{2}{11}+\dfrac{4}{11}+\dfrac{5}{11}\)
\(=1+1=2\)
\(b)74\times43-43+27\times43\)
\(=43\times\left(74-1+27\right)\)
\(=43\times100=4300\)
11,5 x 0,01 + 55,2 : 100 + 1/100 x 33,3
= 0,115 + 0,552 + 0,333
= 1
mong bạn tick cho mik
11,5 x 0,01 + 55,2 : 100 + 1/100 x 33,3
=11,5 x 0,01 + 55,2 x 0,01 + 0,01 x 33,3
=0,01 x ( 11,5 + 55,2 + 33,3 )
= 0,01 x 100
= 1
\(a,50\%+\dfrac{7}{12}-\dfrac{1}{2}\\ =\dfrac{1}{2}+\dfrac{7}{12}-\dfrac{1}{2}\\ =\left(\dfrac{1}{2}-\dfrac{1}{2}\right)+\dfrac{7}{12}\\ =\dfrac{7}{12}\\ b,2022\times67+2022\times43-2022\times10\\ =2022\times\left(67+43-10\right)\\ =2022\times100\\ =202200.\\ c,125-25:3\times12\)
\(=25\times5-25:3\times12\\ =25\times\left(5-\dfrac{1}{3}\right)\times12\\ =25\times\dfrac{14}{3}\times12\\ =1400\)
a,50%+127−21=21+127−21=(21−21)+127=127b,2022×67+2022×43−2022×10=2022×(67+43−10)=2022×100=202200.c,125−25:3×12
=9,8 * 43 + 19 * 9,8 - 61 * 9,8
= 9,8 * (43+19-61)
=9,8 * (62-61)
=9,8*1
=9,8
\(17,5\times43+57\times57\\ =17,5\times\left(43+57\right)\\ =17,5\times10\\ =175\)
125 x 12 + 12 x 874 + 12
= ( 125 + 874 + 1 ) x 12
= 1000 x 12
= 12 000
12 43 x 100,11 - 12,43 : 100 - 12,43 : 10
12.43 x ( 100.11 : 100 : 10 )
12.43 x 0.10011
1.2443673
12,43 x 100,11 - 12,43 : 100 - 12,43 : 10
= 12,43 x 100,11 - 12,43 x 0,01 - 12,43 x 0,1
= 12,43 x (100,11 - 0,01 - 0,1)
= 12,43 x 100
= 1243