2/7 × 5/6 - 1/4 + 2/7 × (-3/5)
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Answer:
Step-by-step explanation:
2/7×5/6-1/4+2/7×(-3/5)
=1/7×5/3-1/4+-(2/7×3/5)
=5/21-1/4+(-6/35)
=5/21-(-(1/4+6/35))
=5/21-(-(1/4×35/35)+(6/35×4/4)
=5/21-(-(35/140+24/140))
=5/21-(-35+24/140)
=5/21-(-69/140)
=5/21+69/140
=(5/21×20/20)+(69/140×3/3)
=100/420+207/420
=100+207/420
=307/420
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