Выполните умножение: 1)1 3/4*2 2)8 *3 1/2 3)2 7/9* 3 3/5 4)3 7/9* 1 1/17 5)5 1/6* 3 1/7 6)7 1/3*2 2/11. Created by lnegenceva. matematika-ru

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October 2021 1 8 Report

Выполните умножение:
1)1 3/4*2
2)8 *3 1/2
3)2 7/9* 3 3/5
4)3 7/9* 1 1/17
5)5 1/6* 3 1/7
6)7 1/3*2 2/11

Answers & Comments

Neeki 1)1 3/4*2=7/4*2=7*2/4(сокращаем на 2)=7*1/2=7/2=3 1/2
2)8*3 1/2=8*7/2=8*7/2(сокращаем на 2)=4*7/1=28/1=28
3)2 7/9*3 3/5=25/9*18/3=25*18/9*3(сокращаем 18 и 9 на 9)=25*2/1*3=50/3=16 2/3.
4)3 7/9* 1 1/17=34/9*18/17=34*18/9*17(сокращаем 34 и 17 на 17,18 и 9 на 9)=2*2/1*1=4/1=4
5)5 1/6 *3 1/7=31/6*22/7=31*22/6*7(сокращаем 6 и 22 на 2)=31*11/3*7=341/21=16 5/21.
6)7 1/3*2 2/11=22/3*24/11=22*24/3*11(сокращаем 22 и 11 на 11, 24 и 3 на 3)=2*8/1*1=16/1=16.

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