Đáp án:
a. 53/6
b. 79/19
c. 1/12
d.2/3
e. -5/44
g. 1/4
h. 5/7
i. 41/60
Giải thích các bước giải:
a. 16/3+7/2 = 32/6 + 21/6 = 53/6
b. 36/17+ 15/23 + 15/7 + 3/19 + 8/23
= 36/17 +15/23 + 15/17 + 3/19 + 8/23
= (36/17 +15/17) ( 15/23+ 8/23) + 3/19
= 51/17 + 1 + 3/19
= 3 + 1 + 3/19
= 57/19 + 19/19 + 3/19
= 79/19
c. -4/3 -1/5 + 7/4 -5/6 + 7/10
=-80/60-12/60+105/60-50/60+42/60
=5/60
=1/12
d. (19/21-14/21)14/5
=5/21.14,5
=2/3
e. 3/11(4/2-7/4)
=3/11(16/12-21/12)
=3/11.-5/12
=-5/44
g. (3/4+1/2).(4/5-3/5)
=(3/4+2/4).(4/5-3/5)
=5/4.1/5
=1/4
h. 3/9.60/7-45/7.3/9
=1/3.(60/7-45/7)
=1/3.15/7
=5/7
i. 16/5.15/64-(12/15+10/15):2
=3/4-2/15:2
=3/4-1/15
=45/60-4/60
=41/60
