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=9/4x2/3+16/9x4/3
=18/12+64/36
=54/36+64/36=118/36=59/18
(36 × 27) : 3 = 36 × (27 : 3)
= 36 × 9
= 324
--------
(125 × 15) : 5
= 125 × (15 : 5)
= 125 × 3
= 375
--------
(15 × 12) : 9
= (5 × 3 × 12) : 9
= 5 × (36 : 9)
= 5 × 4
= 20
--------
450 : (3 × 5)
= 450 : 15
= 30
--------
(45 × 63) : 9
= 45 × (63 : 9)
= 45 × 7
= 40 × 7 + 5 × 7
= 280 + 35
= 315
a) \(2900\times94+2900\times5+2900\)
\(=2900\times\left(94+5+1\right)\)
\(=2900\times100\)
\(=290000\)
b) \(34000:125:8\)
\(=34000:\left(125\times8\right)\)
\(=34000:1000\)
\(=34\)
\(1235\text{×}6789\text{×}\left(630-315\text{×}2\right)\)
\(=1235\text{×}6789\text{×}\left(630-630\right)\)
\(=1235\text{×}6789\text{×}0=0\)
\(\left(100+67\right)\text{×}67+\left(200-38\right)\text{×}33\)
\(=167\text{×}67+167\text{×}33\)
\(=167\text{×}\left(67+33\right)\)
\(=167\text{×}100=16700\)
\(72+36\text{×}2+24\text{×}3+18\text{×}4+12\text{×}2+168\)
\(=72+72+72+72+24+168\)
\(=\left(72\text{×}4\right)+24+168=288+24+168=480\)
36 x 47 + 33 x 36 + 9 x 80
= 36 x (47 + 33) + 9 x 80
= 36 x 80 + 9 x 80
= 80 x (36 + 9)
= 80 x 45
=3600
a) 36 + 12 + 14 + 38 = (36 + 14) + (12 + 38)
= 50 + 50
= 100
b) 2 x 3 x 5 000 = (2 x 5 000) x 3
= 10 000 x 3
= 30 000
c) 9 x 13 + 9 x 7 = 9 x (13 + 7)
= 9 x 20
= 180
1382 x 36 + 619 x 36 - 36
= 1382 x 36 + 619 x 36 - 36 x 1
= 36 x (1382 + 619 - 1)
= 36 x 2000
= 72000
\(\left(\dfrac{14}{24}-\dfrac{5}{12}\right)\) x \(30000\)
= \(\left(\dfrac{14}{24}-\dfrac{10}{24}\right)\) x \(30000\)
= \(\dfrac{1}{6}\) x \(30000\)
= \(5000\)
a,
=36x(1382+619-1)
=36x2000
=72000
b,
=1/6x30000
=5000