Question
If 10 workers can build 3 houses in 60 days, how many workers are needed to build 5 houses in 40 days?
"A Model A Day, Keeps The Algebra Away" - Chi Hung Chan
Focus primarily on upper primary school (P4,5,6) mathematics
No guess and check, no wordy solution, just "Model" answer
My SIX STEPS TO MODEL APPROACH
A must visit website for Singapore PSLE
If 10 workers can build 3 houses in 60 days, how many workers are needed to build 5 houses in 40 days?
A fruit seller brought 350 apples for $140. 30 apples were rotten. He packed the rest in packets of 4 and sold each packet for $1. How much money did he lose from sale ?
Gilian spent 1/3 of her salary each month, gave 2/5 of it to her mother and saved the rest. If she saved $400 each month, what is her total salary ?
Suzanne baked 1200 tartlets. She gave 1/2 of them to her mother and 1/4 of the rest to her sister. How many tartlets did she have left ?
Two pails, A and B, contain 1 litre 900 ml of water altogether. After 680 ml of water is poured from pail A into pail B, the amount of water in each pail is the same. How much water was in pail A at first ? Give your answer in litre and ml.