Lim Wei Lin's answer to Khairin's Primary 5 Maths Whole Numbers Singapore question.
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3)1 file + 1 pen = $21
5 files + 1 pen = $81
4 files : $81 - $21 = $60
1 file : $60 ÷ 4 = $15
4a) 5 thumb drives + 3 DVDs = $75
1 thumb drive + 1 DVD = $17
3 thumb drives + 3 DVDs: $17 x 3 = $51
2 thumb drives : $75 - $51 = $24
1 thumb drive : $24 ÷ 2 = $12
b) cost of 1 DVD : $17 - $12 = $5
5 files + 1 pen = $81
4 files : $81 - $21 = $60
1 file : $60 ÷ 4 = $15
4a) 5 thumb drives + 3 DVDs = $75
1 thumb drive + 1 DVD = $17
3 thumb drives + 3 DVDs: $17 x 3 = $51
2 thumb drives : $75 - $51 = $24
1 thumb drive : $24 ÷ 2 = $12
b) cost of 1 DVD : $17 - $12 = $5
Date Posted:
2 years ago
Thanks so much !!!
Thanks
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