[quote]
Ok my SIL has replied. My model is correct, I have updated to indicate the units.

I’ve included her reply. Use lowest common multiple to manipulate the equal parts. Beginners use model method but the more advanced kids can skip model to save time.

Don’t need calculator. Use the concept that https://promoneysavings.com/need-money-now/ “division is repeated subtraction”/“multiplication is repeated addition” to work out that 41+41+41=123. So 1U=1230 divided by 41=$30. 9U=9x30=$270.

I checked my P4 Onsponge book and this heuristic method is taught on page 95 “Numerators the Same”. SIL said tutors more commonly refer to it as \"Equating Numerators\".

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https://postimg.cc/4KzDrpwW[/quote]I'm sorry for the off-topic post but your handwriting looks amazing