Question

Tính nhanh:

a)4.7.25+2.6.5 b)164.53+47.164

c)427+354+373+246+155

d)27.(13+5)+18(59+14)

Answer 1

a, 4.7.25 + 2.6.5 = (4.25)7 + (2.5)6

= 100.7 + 10.6 = 700 + 60 = 760

b, 164.53 + 47.164 = 164( 53 + 47) = 164 . 100 = 16400

c, 427 + 354 + 373 + 246 + 155 = ( 427 + 373 ) + ( 354 + 246 ) + 155

= 800 + 600 + 155 = 1400 + 155 = 1555

d, 27.(13 + 5) + 18(59 + 14) = 27 . 18 + 18. 73

= 18(27 + 73) = 18. 100 = 1800

Chúc bạn học tốt! ~

Answer 2

a) 4.7.25+2.6.5

= (4.25).7+(2.5).6

= 100.7+10.6

= 700+60 = 760

b) 164.53+47.164

= 164.(53+47)

= 164.100 = 16400

c) 427+354+373+246+155

= (427+373)+(354+246)+155

= 800+600+155

= 1400+155 = 1555

d) 27.(13+5)+18.(59+14)

= 27.18+18.73

= 18.(27+73)

= 18.100 = 1800

Answer 3

a)4.7.25+2.6.5

=(4.25).7+(2.5).6

=100.7+10.6

=700+60

=760

b)164.53+47.164

=164.(53+47)

164.100

16400

c)427+354+373+246+155

=(427+373)+(354+246)+155

=800+600+155

=1400+155

=1555

d)27.(13+5)+18.(59+14)

=27.18+18.73

=18.(27+73)

=18.100

=1800

Answer 4

a/ (4.25).7+(2.5).6

=100.7+10.6

=700+60

=760

b/146.(53+47)

=146.100

=14600

c/(427+373)+(354+246)+155

=800+600+155

=1555

d/27.65+18.73

=(27+73).83

=100.83

=8300