Tính bằng cách thuận tiện :
a,4/5 x 7/6 x 5/2 x 6/14 =
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20 tháng 5 2022 lúc 10:39
Tính bằng cách thuận tiện :
4/5 x 3/7 + 4/5 x 6/7 - 4/5 x 4/14
= 4/5 x ( 3/7 + 6/7 - 4/14 )
= 4/5 x ( 3/7 + 6/7 - 2/7 )
= 4/5 x 7/7
= 4/5
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4/5 x 3/7 + 4/5 x 6/7 - 4/5 x 4/14
= 4/5 x ( 3/7 + 6/7 - 4/14)
= 4/5 x 1
= 4/5
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Tính bằng cách thuận tiện nhất:
4/5 x 3/7 + 4/5 x 6/7 - 4/5 x 4/14
`4/5 xx 3/7 + 4/5 xx 6/7 - 4/5 xx 4/14`
`= 4/5 xx ( 3/7 + 6/7-4/14)`
`= 4/5 xx 1`
`= 4/5`
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tính bằng cách thuận tiện nhất:
4/5 x 3/7 x 4/5 x 6/7 x 4/5 x4/14(giúp với)
\(\dfrac{4}{5}\times\dfrac{3}{7}\times\dfrac{4}{5}\times\dfrac{6}{7}\times\dfrac{4}{14}=\dfrac{4}{5}\times\dfrac{3}{7}+\dfrac{4}{5}\times\dfrac{6}{7}-\dfrac{4}{5}\times\dfrac{2}{7}=\dfrac{4}{5}\times\left(\dfrac{6}{7}+\dfrac{3}{7}-\dfrac{2}{7}\right)=\dfrac{4}{5}\)
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Tính bằng cách thuận tiện nhất
4/5 x 3/7 + 4/5 x 6/7 - 4/5 :x 4/14
= 4/5 x ( 3/7 + 6/7 - 4/14 )
= 4/5 x ( 3/7 + 6/7 - 2/7 )
= 4/5 x 7/7
= 4/5
tính bằng cách thuận tiện nhất:
a,7/4 x 11/21 + 11/21 x 5/4
b,23/14 x 6/13 -9/14 x 6/13
a, = \(\frac{11}{21}\)x \(\left(\frac{7}{4}+\frac{5}{4}\right)\)
= \(\frac{11}{21}\)x 3
= \(\frac{33}{21}\)
b) = \(\left(\frac{23}{14}-\frac{9}{14}\right)\)x \(\frac{6}{13}\)
= 1 x \(\frac{6}{13}\)
= \(\frac{6}{13}\)
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Tính bằng cách thuận tiện nhất :
a, 2 x 9 x 5 x 7 x 4 x 25
b, 6 x 14 x 5 x 25 x 3 x 4
a, 2x9x5x7x4x25
=2x5x4x25x9x7
=10x100x63
=63000
b,6x14x5x25x3x4
=6x5x3x4x25x14
=90x100x14
=9000x14
=126000
~HT~
\(2\times9\times5\times7\times4\times\)\(25\)
\(=\left(2\times5\right)\times\left(25\times4\right)\)\(\times\left(9\times7\right)\)
\(=10\times1000\times63\)
\(=630000\)
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Tính bằng cách thuận tiện nhất
a) 2 x 9 x 5 x 7 x 4 x 25
b)6 x 14 x 5 x 25 x 3 x4
a, 2.9.5.7.4.25=(2.5).(25.4).(7.9)
=10.100.63=63000
câu b làm tương tự tích giúp mình nha
a) dfrac{3}{7}+dfrac{4}{9}+dfrac{8}{14}+dfrac{10}{18}b) dfrac{1}{2}xdfrac{2}{3}:dfrac{5}{6}xdfrac{5}{6} bài này là bài tính bằng cách thuận tiện nhất nha !
Đọc tiếp
a) \(\dfrac{3}{7}\)+\(\dfrac{4}{9}\)+\(\dfrac{8}{14}\)+\(\dfrac{10}{18}\)
b) \(\dfrac{1}{2}\)x\(\dfrac{2}{3}\):\(\dfrac{5}{6}\)x\(\dfrac{5}{6}\)
bài này là bài tính bằng cách thuận tiện nhất nha !
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6 tháng 5 2022 lúc 18:27
1.Tính bằng cách thuận tiện nhất :
(6/7 - 2/7) : 4/9 x 3 =
7/11 x 5/6 + 4/11 x 5/6 =
1,
a,=4/7:4/9.3
=9/7.3
=27/7
b,=(7/11+4/11).5/6
=1.5/6
=5/6
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`(6/7-2/7):4/9xx3=4/7xx9/4xx3=[4xx9xx3]/[7xx4]=27/7`
`7/11xx5/6+4/11xx5/6=(7/11+4/11)xx5/6=11/11xx5/6=5/6`
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