Question

а) 7 3
— - — =
15 10

б) 5 6
— : — =
42 7



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Answer 1

а) 7/15-3/10=2×7/ 2×15-3×3/3×10=14/30-9/30=14-9/30=5/30=1×5/6×5=1/6

б)

5/42 : 6/7 =5/42 ×7/6 =5×7/ 42×6=35/252=5×7/36×7=5/36