Toán Lớp 7: a)5/17 +2/3 -20/12 +7/9 +12/17
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Toán Lớp 7: a)5/17 +2/3 -20/12 +7/9 +12/17
Comments ( 2 )
Giải đáp:
7/9
Lời giải và giải thích chi tiết:
a)5/17 +2/3 -20/12 +7/9 +12/17
=(5/17+12/17)+(2/3-20/12) +7/9
=17/17+(2/3-5/3) +7/9
=1+(-1)+7/9
=0+7/9
=7/9
a) 5/17 + 2/3 – 20/12 + 7/9 + 12/17
= (5/17 + 12/17) + (2/3 + 7/9) + -20/12
= 1 + 13/9 + -20/12
= 22/9 + -20/12
= 7/9