54 buttons ÷ 9 button cards = 6
She should buy 6 cards of buttons.
Answer:
Step-by-step explanation:
Tổng : -7,5+(-3,6)+(-4,7)+(-5,3)+(-1,4)=-22,5
the first blank is 10
and the second blank is 5
4 hours, 150 x 4 = 600 pls give brainliest
