Mashqlar
49. Arifmetik amallar qonunlari va xossalarini qo‘llab, sonli ifodaning qiymatini toping:
1)
29·0,45+0,45·11; 2)
(51,8+44,3+48,2–24,3)·
;
3)
4,07–5,49+8,93–1,51; 4)
–11,401–23,17+4,401–10,83.
50.
O‘xshash hadlarni ixchamlang:
1)
4a+2b+a–b; 3) 0,1c–0,3+d–c–2,1d;
2)
x–2y–3x+5y; 4)
8,7–2m+n–m+
n.
51.
O‘xshash hadlarni ixchamlang:
1)
2,3a–0,7a+3,6a–1; 3)
x+
x–
a–
a+2;
2)
0,48b+3+0,52b–3,7b; 4) y–b–y+b–3;
5)
2,1m+n–3,2n+2m+1,1m–n; 6) 5,7p–1,6p+0,3q+0,8q+0,9p–1,1q
52.
Ifodani soddalashtiring:
1) 3(2x+1)+5(1+3x); 3) 10(n+m)–4(2m+7n);
2) 4(2+x)–3(1+x); 4)
11(5c+d)+3(d+c).
53.
Ifodani soddalashtiring va son
qiymatini toping:
1)
5(3x–7)+2(1–x), bunda 
;
2)
7(10–x)+3(2x–1), bunda x=0,048;
3)
(6x–3)+
(5x–15), bunda x=3,01;
4)
0,01(2x–0,1)+0,1(x–100), bunda x=–10.
54.
Arifmetik amallarning xossalaridan foydalanib, hisoblang:
1)
(0,14+2,1–3,5); 3)
(18
+21
):3;
2)
(4,8–0,24–1,2); 4)
(15
+20
)·
.
