Question

a)\(2021x45+2021x30+2021x50+2021x60 \)

b)\(90x60+90x80+65x90\)

\(xlànhânnhamọingười\)

Answer 1

a)\(2021x45+2021x30+2021x50+2021x60 \)

= 2021x(45+30+50+60)

=2021x185

=373885

b) \(90x60+90x80+65x90\)

= 90x(60+80+65)

=90x205

=18450

Không biết đề có nhầm không, bài tính nhanh mà số lẻ quá~

Answer 2

a) 2021 x 45 + 2021 x 30 + 2021 x 50 + 2021 x 60

= 2021 x (45 + 30 + 50 + 60)

= 2021 x 185

= 373 885

b) 90 x 60 + 90 x 80 + 65 x 90

= 90 x (60 + 80 + 65)

= 90 x 205

= 18 450

Answer 3

a.2021x(45+30+50+60=2021x185=373885

b,90x(60+80+90)=90x230=20700

Answer 4

a,=2021.(45+30+50+60)

=2021.185

=373885

b,=90.(60+80+65)

=90.205

=18450