Cecilia simplified an expression. Her work is shown below. (63+23) – 1.5*(4,5 – 0,5
04-15x(4.5-0.5)
Step 1
775x(45-05)
Step 2
Step 3
Step 4
775x9
69.75
Where did Cecilia make her first mistake?
step
step 2
Step 3
Step 4

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