75/100+18/21+5/4+19/32+6/42+13/32
75/100+18/21+19/32+1/4+3/21+13/32
75/100+18/21+19/32+1/4+3/21+13/32=?
75/100+18/21+19/32+1/4+3/21+13/32
= 18/21 + 3/21 + 19/32 + 13/32 + 75/100 + 1/4
= (18/21 + 3/21) + (19/32 + 13/32) + (3/4 + 1/4)
= 21/21 + 32/32 + 4/4
= 1 + 1 + 1
= 3
Tính nhanh :75/100+18/21+19/32+1/4+3/21+13/32
\(\frac{75}{100}+\frac{18}{21}+\frac{19}{32}+\frac{1}{4}+\frac{3}{21}+\frac{13}{32}\)
\(=\left(\frac{75}{100}+\frac{1}{4}\right)+\left(\frac{18}{21}+\frac{3}{21}\right)+\left(\frac{19}{32}+\frac{13}{31}\right)\)
\(=1+1+1\)
\(=3\)
75100+1821+1932+14+321+133275100+1821+1932+14+321+1332
=(75100+14)+(1821+321)+(1932+1331)=(75100+14)+(1821+321)+(1932+1331)
=1+1+1=1+1+1
=3
Tính nhanh : 75/100 +18/21+19/32+1/4+3/21+13/32
Có những phân số chưa tối giản. Tuy nhiên vì đây là bài tính nhanh nên sẽ không rút gọn hết. Xíu quy đồng lại nữa :( Nên chọn lựa ra thôi.
\(\frac{75}{100}=\frac{3}{4}\)
Viết lại có: \(\frac{3}{4}+\frac{18}{21}+\frac{19}{32}+\frac{1}{4}+\frac{3}{21}+\frac{13}{32}\)
\(=\left(\frac{3}{4}+\frac{1}{4}\right)+\left(\frac{18}{21}+\frac{3}{21}\right)+\left(\frac{19}{32}+\frac{13}{32}\right)\)
\(=1+1+1\)
\(=3\)
= 3 nha banj
tính nhanh : 75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32
75/100+18/21+19/32+1/4+3/21+13/32
=(75/100+1/4)+(18/21+3/21)+(19/32+13/32)
=1+1+1=3
75/100+18/21+19/32+1/4+3/21+13/32
=1/4+75/100+19/32+13/32+3/21+18/21
=1+1+1=3
tính
75/100 + 18/21 + 19/32 +1/4 + 3/21 + 13/32
=(75/100+1/4)+(18/21+3/21)+(19/32+13/32)
=1+1+1
=3
=3 nha
Tính bằng cách hợp lý :
75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32
\(=\dfrac{75:25}{100:25}+\dfrac{18}{21}+\dfrac{19}{32}+\dfrac{1}{4}+\dfrac{3}{21}+\dfrac{13}{32}\\ =\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{18}{21}+\dfrac{3}{21}\right)+\left(\dfrac{19}{32}+\dfrac{13}{32}\right)\\ =1+1+1=3\)
= (19/32+13/32) + (18/21+3/21) + 75/100+1/4
= 1+1+75/100+1/4
= 2+75/100+1/4
= 11/4+1/4
= 3
Đáp án là 3 nha em
tính nhanh
75/100+18/21+19/32+1/4+3/21+13/32
75/100+18/21+19/32+1/4+3/21+13/32=3 ban nhe!
ung ho nhe!
Tính nhanh
a 75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32
b 4 và 2/5 + 5 và 6/9 + 2 và 3/4 + 1/4 + 1/3 + 3/5
mik cần gấp các bn ơi
a )
75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32
= 3/4 + 18/21 + 19/321 + 1/4 + 3/21 + 13/32
= ( 3/4 + 1/4 ) + ( 18/21 + 3/21 ) + ( 19/32 + 13/32 )
= 1 + 1 + 1
= 3
b )
4 và 2/5 + 5 và 6/9 + 2 và 3/4 + 1/4 + 1/3 + 3/5
= 22/5 + 51/9 + 11/4 + 1/4 + 1/3 + 3/5
= ( 22/5 + 3/5 ) + ( 51/9 + 1/3 ) + ( 11/4 + 1/4 )
= 25/5 + 54/9 + 12/4
= 5 + 6 + 3
= 14
a)\(\frac{75}{100}+\frac{18}{21}+\frac{19}{32}+\frac{1}{4}+\frac{3}{21}+\frac{13}{32}=\frac{3}{4}+\frac{18}{21}+\frac{1}{4}+\frac{19}{32}+\frac{3}{21}+\frac{13}{32}\)
\(=\left(\frac{3}{4}+\frac{1}{4}\right)+\left(\frac{18}{21}+\frac{3}{21}\right)+\left(\frac{19}{32}+\frac{13}{32}\right)\)
\(=1+1+1=3\)