Question

tính thuận tiện

a) 536*10+64*10

b) 34*2-14*2

c) 20*6*34*6

d)36*7/6*7

Answer 1

a, = 10 x (536+64) = 10 x 600 = 6000

b, = 2 x (34-14) = 2 x 20 = 40

d, = 6 x 6 x 7 / 6 x 7 = 6

Tk mk nha

Answer 2

a. 6000

b. 40

c. 24480

d. 42

Answer 3

a 6000 b 40 c 24480 d 42

Answer 4

a) 536 x 10 + 64 x 10

= ( 536 + 64 ) x 10

= 600 x 10 = 6000

b) 34 x 2 - 14 x 2

= ( 34 - 14 ) x 2 

= 20 x 2 = 40

Answer 5

536 x 10 + 64 x 10

= 10 x ( 536 + 64 )

= 10 x 600

= 6000

34 x 2 - 14 x 2

= ( 34 - 14 ) x 2

= 20 x 2

= 40