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a) 708 : 354=2 b) 704 : 234=3.008547008547009
7552 : 236=32 8770 : 365=24.02739726027397
9060 : 453=20 6260 : 156=40.12820512820513
\(\frac{561}{704}.\frac{39}{47}+\frac{561}{704}.\frac{8}{47}\)
\(=\frac{561}{704}.\left(\frac{39}{47}+\frac{8}{47}\right)\)
\(=\frac{561}{704}.1\)
\(=\frac{51}{64}\)
Giữ nguyên A = abc + 365
B = (a . 100 + 60 + c) + (300 + b . 10 + 4)
B = a . 100 + 60 + c + 300 + b . 10 + 4
B = abc + 364
Vì 365 > 364 nên A > B
1.
a) \(\frac{16}{24}-\frac{1}{3}=\frac{16}{24}-\frac{8}{24}=\)\(\frac{8}{24}=\frac{1}{3}\)
b) \(\frac{4}{5}-\frac{12}{60}=\frac{48}{60}-\frac{12}{60}=\frac{36}{60}=\frac{9}{15}\)
3.
a)\(\frac{17}{6}-\frac{2}{6}=\frac{17-2}{6}=\frac{15}{6}\)
b) \(\frac{16}{15}-\frac{11}{15}=\frac{16-11}{15}=\frac{5}{15}=\frac{1}{3}\)
c) \(\frac{19}{12}-\frac{13}{12}=\frac{19-13}{12}=\frac{6}{12}=\frac{1}{2}\)
234 x 34 + 234 x 66
= 234 x ( 34 + 66 )
= 234 x 100
= 23400
( K ĐÚNG CHO MÌNH ) NHA MỌI NGƯỜI !!! ^^
234x34+234x66
=234x(34+66)
=234x100
=23400
Bạn ơi nhé . Đúng 100% luôn đó , nếu sai tớ chết luôn!!!
\(a,\frac{8}{15}+\frac{2}{3}=\frac{8+10}{15}=\frac{18}{15}=\frac{6}{5}\)
\(b,\frac{3}{7}+\frac{4}{8}=\frac{24+28}{56}=\frac{62}{56}=\frac{31}{28}\)
a) \(\frac{8}{15}+\frac{2}{3}=\frac{8}{15}+\frac{10}{15}=\frac{8+10}{15}=\frac{18}{15}=\frac{6}{5}\)
b) \(\frac{3}{7}+\frac{4}{8}=\frac{24}{56}+\frac{28}{56}=\frac{24+28}{56}=\frac{52}{56}=\frac{13}{14}\)
Trả lời :
1523 + 263 = 1786
9133 - 236 = 8897
63 x 23 = 1449
3956 : 86 = 46
~ Hok tốt ~
Trả lời :
1523 + 263 = 1786
9133 - 236 = 8897
63 x 23 = 1449
3956 : 86 = 46
# Linh_Chymtee2k7 ~ Yew thw #
a) \(\frac{2}{5}+\frac{9}{15}=\frac{2}{5}+\frac{3}{5}=\frac{5}{5}=1\)
b) \(\frac{15}{45}+\frac{25}{30}=\frac{1}{3}+\frac{5}{6}=\frac{2}{6}+\frac{5}{6}=\frac{7}{6}\)
c) \(\frac{28}{32}+\frac{45}{72}=\frac{7}{8}+\frac{5}{8}=\frac{12}{8}=\frac{3}{2}\)
d) \(\frac{8}{28}+\frac{5}{30}=\frac{2}{7}+\frac{1}{6}=\frac{12}{42}+\frac{7}{42}=\frac{19}{42}\)
a) \(\frac{2}{5}+\frac{9}{15}\)=\(\frac{2}{5}+\frac{3}{5}=\frac{2+3}{5}=1\)
b)\(\frac{15}{45}+\frac{25}{30}=\frac{1}{3}+\frac{5}{6}=\frac{2}{6}+\frac{5}{6}=\frac{2+5}{6}=\frac{7}{6}\)
c)\(\frac{28}{32}+\frac{45}{72}=\frac{7}{8}+\frac{5}{8}=\frac{7+5}{8}=\frac{12}{8}=\frac{3}{2}\)
d)\(\frac{8}{28}+\frac{5}{30}=\frac{2}{7}+\frac{1}{6}=\frac{12}{42}+\frac{7}{42}=\frac{12+7}{42}=\frac{19}{42}\)