Tính bằng cách thuận tiện:
50 x 125 x 2 x 8 x 202
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a, 2019 x (2 x 5)
= 2019 x 10
= 20 190
b, (5 x 2) x (8 x 125) x 9
= 10 x 1000 x 9
= 90 000
c, (4 x 25) x 2019
= 100 x 2019
= 201 900
d, (50 x 2) x (125 x 8) x 202
= 100 x 1000 x 202
= 20 200 000
a) 2019 x 2 x 5
= (2 x 5) x 2019
= 10 x 2019
= 20190b) 5 x 8 x 9 x 2 x 125
= (5 x 2) x (125 x 8) x 9
= 10 x 1000 x 9
= 10000 x 9
= 90000
c) 4 x 2019 x 25
= (4 x 25) x 2019
= 100 x 2019
= 201900
d) 50 x 125 x 2 x 8 x 202
= (50 x 2) x (125 x 8) x 202
= 100 x 1000 x 202
= 100000 x 202
= 20200000
b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 25
= 100000 × 25
= 2500000
b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 25
= 100000 × 25
= 2500000
\(202x\frac{3}{4}+202x\frac{5}{4}+202x8\)
\(=202x\left(\frac{3}{4}+\frac{5}{4}+8\right)\)
\(=202x\left(\frac{8}{4}+8\right)\)
\(=202x\left(2+8\right)\)
\(=202x10\)
\(=2020\)
\(=202*(\frac{3}{4}+ \frac{5}{4}+8) = 202*9 = 1818\)
Trả lời :
25 x 8 x 50 x 125 x 4 x 2
= ( 25 x 4 ) x ( 8 x 125 ) x ( 50 x 2 )
= 100 x 1000 x 100
= 100 000 000
~HT~
#sad
a ) 2 x 3 x 4 x 8 x 50 x 25 x 125
= 3 x 2 x 50 x 4 x 25 x 8 x 125
= 3 x ( 2 x 50 ) x ( 4 x 25 ) x ( 8 x 125 )
= 3 x 100 x 100 x 1000
= 30000000
b ) 45 x 128 - 90 x 64
= 45 x ( 2 x 64 ) - 90 x 64
= ( 45 x 2 ) x 64 - 90 x 64
= 90 x 64 - 90 x 64
= 0
a) = (2.50).(4.25).(8.125).3=100.100.1000.3=30000000
b)45.128-90.64=45.128-45.2.64
=45.128-45.128
=0
(50x2)x(125x8)x202
=100x1000x202
=202000
(50 x 2) x (125 x 8) x 202
= 100 x 1000 x 202
= 20 200 000