Toán Lớp 4: (9/5+3/3):7/6 tính bằng 2 cách
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Toán Lớp 4: (9/5+3/3):7/6 tính bằng 2 cách
Comments ( 2 )
Cách 1.
(9/5 + 3/3) : 7/6
= 14/5 : 7/6
= 14/5 × 7/6
= 84/35
= 12/5
Cách 2.
(9/5 + 3/3) : 7/6
= 9/5 : 7/6 + 3/3 : 7/6
= 9/5 × 6/7 + 1 × 6/7
= 54/35 + 30/35
= 84/35
= 12/5
Cách 1:
(9/5+3/3):7/6
=9/5:7/6+3/3:7/6
=9/5.6/7+3/3.6/7
={54}/{35}+6/7
={54}/{35}+{30}/{35}
={54+30}/{35}
={84}/{35}
={12}/{5}
Cách 2:
(9/5+3/3):7/6
=(9/5+5/5).6/7
={14}/{5}.6/7
={84}/{35}
={12}/{5}
Dấu chấm là dấu nhân 😀