Ответ:
а) (2/7+5/21)×21=11
б) (7/12-5/9)×12=1/3
в)(3/8+5/12)×24=19
г) (8/11-3/22)×44=26
а) 2/7+5/11=_2×3_ + _5×1__= _6_+_5_=11
21 21 21 21
11 ×21=11
21
б)7/12-5/9=1/36
1/36×12= 1×12= 12/36=1/3
36
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Answers & Comments
Ответ:
а) (2/7+5/21)×21=11
б) (7/12-5/9)×12=1/3
в)(3/8+5/12)×24=19
г) (8/11-3/22)×44=26
а) 2/7+5/11=_2×3_ + _5×1__= _6_+_5_=11
21 21 21 21
11 ×21=11
21
б)7/12-5/9=1/36
1/36×12= 1×12= 12/36=1/3
36