Thuc hien phep tinh ( nhanh neo co the )
3 × 52 - 64 ÷ 23
17 × 81 + 19 × 17 + 210
78 ÷ { 390 ÷ [ 410 - ( 340 + 15 × 4 ) ] }
Những câu hỏi liên quan
Thuc hien phep tinh(nhanhneu co the)
\(\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
\(\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
\(=\frac{2^{19}.3^9+3.5.2^{18}.3^8}{2^9.3^9.2^{10}+2^{20}.3^{10}}\)
\(=\frac{2^{19}.3^9+2^{18}.3^9.5}{2^{19}.3^9+2^{19}.2.3^9.3}\)
\(=\frac{2^{18}.3^9.\left(2+5\right)}{2^{19}.3^9.\left(1+6\right)}\)
\(=\frac{7}{2.7}\)
\(=\frac{1}{2}\)
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1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
\(\dfrac{1}{4}-\dfrac{1}{3}+\dfrac{5}{12}\\ =\dfrac{3}{12}-\dfrac{4}{12}+\dfrac{5}{12}\\ =\dfrac{3-4+5}{12}\\ =\dfrac{4}{12}\\ =\dfrac{1}{3}\)
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thuc hien phep tinh (Tinh nhanh neu co the)
(-5/12+7/4-3/8)-|4 va 1/2 -7 va 1/2|-( 1/4-5/2)
thuc hien phep tinh (tinh nhanh neu co the)
a. 40{[ 11+(26-3^2)]/2}
Thuc hien phep tinh(nhanh neu co the)
1024:2^4+140:(38+2^5)-49^22:7^21
Thuc hien phep tinh bang cach hop li ( neu co the )
a / 81 + 243 + 19
b / ( 67 + 129 ) + ( 133 - 29 )
c / 75 × 16 + 84 × 75 - 500
d / 4 × 52 - 16 : 23 20200
a / 81+19+243
= 100+243
=343
b/ = 67 +129+133-29
= 67+133+129-29
= 200-100
= 100
c / = 75 x ( 16+84)-500
= 75 x 100-500
= 7500-500
= 7000
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a / 81+19+243
= 100+243
=343
b/ = 67 +129+133-29
= 67+133+129-29
= 200-100
= 100
c / = 75 x ( 16+84)-500
= 75 x 100-500
= 7500-500
= 7000
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Thuc hien phep tinh (Tinh nhanh neu co the)
18 x [ (3^4 x 24 + 3^4 - 27 x 3^4) - 71 x1^30 ] - 80
CAC BAN GIUP MINH VOI
thuc hien phep tinh
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
= 73 . ( 35 - 20 + 85 ) + 27. ( 19 + 81 )
= 73 . 100 + 27. 100
= ( 73 + 27 ) . 100
= 100 . 100
= 10 000
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73. 35+ 27.19- 20. 73+ 81. 27+ 85. 73
= 73.(35+ 85 - 20) + 27.(19+81)
=73.100 +27.100
=100.(27+73)
=100.100
=10000
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THUC HIEN PHEP TINH ( TINH NHANH NEU CO THE ) :
1) ( 56 x 46 - 25 x 23 ) : 23
2) ( 28 x 54 + 56 x 36 ) : 21 : 2
3) ( 76 x 34 - 19 x 64 ) : ( 38 x 9 )
4) ( 2 + 4 + 6 + .... + 100 ) x ( 36 x 333 - 108 x 111 )
5) ( 5x 411 - 3 x 165 ) : 410
6) 7256 x 4375 - 725
3650 + 4375 x 7255