1. You didn't climb a big tree yesterday.
2. You didn't wash your dad's car last Saturday.
3. You didn't walk in the park late at night.
4. You didn't stay at home all day yesterday.
5. You didn't paint your room yesterday.
1 целая 2/3-5у=5/7
-5у=5/7-1 целая 2/3
-5у=5/7-5/3
-5у= (5*3)-(5*7)
_____
21
-5у=15-35
_______
21
-5у=-20
У=-20:-5
У=4
1) 8×10-9=71
2)10÷10+9=10
3)40÷10+9=13
4)23×10-9=221
5)18×10-9=171
6)150÷10+9=24
Log 0,4 9-log 0,4 X=loq 0,4 3
Log0,4 9x= log0,4 3
9x=3|:9
x= 1/3
<span>:а) 143,95 до единиц</span>≈144
<span> б) 19,328 до десятых</span>≈19,3
<span> в) 1,928 до сотых</span>≈1,93