Question

b) 640 = 80 x 4 - 4 of 20 +639 - 72:9​

Answer 1

Answer:583

Step-by-step explanation:

=(640/80)×4-(4×20)+639-(72/9)

=8×4-80+639-8

=32-80+639-8

=(-48)+639-8

=583

Answer 2

Answer:

583

Step-by-step explanation:

this is the correct ok

ok bye

thank you