Question

Tính nhanh :a)894+290+210+106 ;b)9*540+9*460

 

Answer 1

a) 894 + 290 + 210 + 106

= ( 894 + 106 ) + ( 290 + 210 )

= 1000 + 500

= 1500

b) 9 x 540 + 9 x 460

= 9 x ( 540 + 460 )

= 9 x 1000

= 9000

Answer 2

lấy máy tính mà bấn

Answer 3

a,

894 + 290 + 210 + 106 = ( 894 + 106 ) + (290 + 210 ) = 1000 + 500 =1500

b

9 * 540 + 9 * 460 =9 * (540 +460) =9 * 1000 = 9000

Answer 4

a, 894+290+210+106 = (894+106)+(210+290) = 1000+500 = 1500

b, 9*540+9*460 = 9*(540+460) = 9*1000 = 9000