пожалуста срочно ответе. Created by 1231349. matematika-ru

пожалуста срочно ответе...

October 2021 1 39 Report

пожалуста срочно ответе

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piksaeva85znayka 1113.
1) 3 1/5÷2 2/15=16/5÷32/15=16/5×15/32=1/1×3/2=3/2=1 1/2
2)1 7/8÷4 1/6=15/8÷25/6=15/8×6/25=3/4×3/5=9/20
3)6 1/2÷1 6/7=13/2÷13/7=13/2×2/13=1/1×1/1=1
4)6 2/3÷2 7/9=20/3÷25/9=20/3×9/25=4/1×3/5=12/5=2 2/5
5)5 3/11÷2 7/11=58/11÷29/11=58/11×11/29=2/1×1/1=2
6)5 1/3÷3 5/9=16/3÷32/9=16/3×9/32=1/1×3/2=3/2=1 1/2
7) не видно
8)6 2/5÷1 7/9=32/5÷16/9=32/5×9/16=2/5×9/1=18/5=3 3/5
1114.
1)(2/7+5/21)÷1 4/7=1/3
2/7+5/21=6/21+5/21=11/21
11/21÷1 4/7=11/21÷11/7=11/21×7/11=1/3×1/1=1/3
2)(8/11+3/22)÷5/11=3 4/5
8/11+3/22=16/22+3/22=19/22
19/22÷5/11=19/22×11/5=19/1×1/5=19/5=3 4/5
3)1 7/12÷(3/8+5/12)=2
3/8+5/12=9/24+10/24=19/24
1 7/12÷19/24=19/12÷19/24=19/12×24/19=1/1×2/1=2
4)17/36÷(7/12-5/9)=17
7/12-5/9=21/36-20/36=1/36
17/36÷1/36=17/36×36/1=17/1=17
5) не видно
6)не видно
1115.
1) 2/9х=5/12
х=5/12÷2/9
х=5/12×9/2
х=5/4×3/2
х=15/8
х=1 7/8

2)4/15у=2/5
у=2/5÷4/15
у=2/5×15/4
у=1/1×3/2
у=3/2
у=1 1/2

3)3/5х=6
х=6÷3/5
х=6/1×5/3
х=2/1×5/1
х=10/1
x=10

4)7/8у=14
y=14÷7/8
y=14/1×8/7
y=2/1×8/1
y=16

5)3/7х=1 4/5
х=1 4/5÷3/7
х=9/5×7/3
х=3/5×7/1
х=21/5
х=4 1/5

6) не видно

1116 и 1117 плохо видно

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