вычислите удобным способом (44*58)/11 (69*60)/30 (26*20)/13 (63*88)/21 (350*48)/70 (47*200)/50 (2*17*14)/28 (21*18)/14 (5*11*32)/16
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Вычислите удобным способом(44*58)/11 =
Сокращаем 44 и 11 на 11
(4•58)/1= 4• 58= 4•(50+8)= 4•50+4•8=
200+32=232
(69*60)/30 =
Сокращаем 60 и 30 на 30
(69•2)/1= 69•2= (60+9)•2=
60•2+9•2= 120+18=138
(26*20)/13 =
Сокращаем 26 и 13 на 13
(2•20)/1= 2•20= 40
(63*88)/21 =
Сокращаем 63 и 21 на 21
(3•88)/1= 3•88= 3•(80+8)=
3•80+3•8= 240+24= 264
(350*48)/70 =
Сокращаем 350 и 70 на 10
(35•48)/7=
Сокращаем 35 и 7 на 7
(5•48)/1= 5•48= 5• (40+8)=
5•40+5•8= 200+40= 240
(47*200)/50 =
Сокращаем 200 и 50 на 50
(47•4)/1= 47•4= (40+7)•4=
40•4+7•4= 160+ 28= 188
(2*17*14)/28 =
Сокращаем 14 и 28 на 14
(2•17•1)/2=
Сокращаем 2 и 2 на 2
(1•17•1)/1= 17
(21*18)/14 =
Сокращаем 21 и 14 на 7
(3•18)/2=
Сокращаем 18 и 2 на 2
(3•9)/1= 3•9= 27
(5*11*32)/16=
Сокращаем 32 и 16 на 16
(5•11•2)/1= (5•2)•11= 10•11= 110