Question

Alex spent 1/3 of his pocket money on a toy airplane and 2/3 of the remainder on a toy robot. He had $20 left. How much did
he spend altogether?

Answer 1

He spent $70 in total! He spent ⅓ of his money on a toy plane remainder ³/³ -
⅓ = ⅔. Spent on toy robot = 2/3 * 2/3 = 4/9
Total spent = 1/3 + 4/9 = 3/9 + 4/9 = 7/9
Left = 9/9 - 7/9 = 2/9
Then the final step,
2/9 to $20
1/9 to 20/2 = $10
7/9 to 10*9 = $70

Answer 2

x is total he started with
he spent 1/3 x and 2/3*2/3 = 4/9 x
3/9 + 4/9 = 7/9 x spent
left is 2/9 x = $20
so x = 180/2 = $ 90 to start
left with $20 so spent $70

Answer 3

Nah is hard I can under With unit block