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10.Tính bằng cách thuận tiện nhất: 94 x 2023 + 2023 : 1/6 nhanh giúp mình sáng mai mình nộp rồi
Bài 1:
\(\dfrac{2}{1\times4}+\dfrac{2}{4\times7}+.....+\dfrac{2}{94\times97}\)
Bài 2:
\(6+3\times\left(x-3\right)=24\)
\(x\div0,25+\dfrac{x}{5}+x\times2=1972\)
B , ( 2/15 + 3/40 + 4/96 + 5/204 + 6/391 ) *x ( x-1) =20/69
A , ( 1/4 + 1/28 + 1/70 + ...... + 1/8554 ) *x = 31/94
Tính nhanh:
94 x 473 - 94 x 73
2+4+6...94+96+98
(5+6+11-41) * (1+2+3+...+100)
12*85+35-182-35*94
2*31*12+4*6+42+8*27*3
12*35+35*182-35*94
125*98-125*46-52*25
(2+4+6+...+100)*(11*7-78-1)
20152015*2016-20162016*2015
2013 x 2014 x ( 36 x 47 - 18 x 94 ) = ?
2013 x 2012 x ( 36 x 47 - 18 x 94 ) = ?
2013 x 2014 x ( 36 x 47 - 18 x 94 )
