Question

a) (1200+60) : 12

b) (2100-42):21

Answer 1

a) (1200+60) : 12=1260 : 12=105

b) (2100-42):21=2058:21=98

Answer 2

\(\left(a\right)\left(1200+60\right)\div12\)

\(=1200\div12+60\div12\)

\(=100+5\)

\(=105\)

\(\left(b\right)\left(2100-42\right)\div21\)

\(=2100\div21-42\div21\)

\(=100+2\)

\(=102\)

\(\text{Đảm bảo đúng! mình học rồi!}\)

Answer 3

a) ( 1200 + 60 ) : 12

= 1200 : 12 + 60 : 12

= 100 + 5

= 105

b) ( 2100 - 42 ) : 21

= 2100 : 21 - 42 : 21

= 100 - 2

= 98