zadanie 1. wykonaj obliczenia
a) -21-7
-18+6
-14-(-23)
b) -6*7
-8*(-9)
-75/3
C ) + 2
5
d)
e)
(
f)
-
g) 0,8 + 0,4
1,2-0,7
2,1 -3
h) 0,3 * 2
1,6* (-3)
0,4 / 2
zadanie 2
oblicz ( pamiętaj o właściwej kolejności wykonywania działań)
a) -4*(-2-11)
b) -7+2* (-5)
c) -11-12/(-6)
d) -8-5*(-4)-4*(-6)
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Zad.1.
a) -28
-12
9
b) -42
72
-25
c) 3*5/5 = 3/1=3
d)
(3 + (1 / 7)) - 4 ~ -0.857142857
e)10/11
10/(8*3)=24
(-2/3)*(-3/8)=1/4
f) 2/5/3 = 2/(5*3) = 2/15
(3/7)/(1/2) = (3/7)*(2/1)=(6/7)
-(5/8)/(1/3) = (-5/8)/(1/3)=(-5/8)*(3/1)=-15/8=-(15/8)
g) 1,2
0,5
-0,9
h)0,6
-4,8
0,2
Zad.2
a)52, bo -4*(-2-11)=-4*(-9)=52
b)-7+2*(-5)=-7+(-10)=-17
c) -11-12/(-6)=-11-(12/(-6))=-9
d) -8-5*(-4)-4*(-6)=-8-(5*(-4))-(4*(-6))=-8-(-20)-(-24)==-8+20+24=36
a) -21 -7 = -28
-18 + 6 = - 12
-14 -(-23) = -14+23 = 9
b) - 6 * 7 = -42
- 8 * (-9) = 72
-75/3 = - 25
c) 3/5 + 2 i 2/5 = 2 i5/5 = 3
5 i9/11 + 6/11 = 5 i 15/11 = 6 i 4/11
1 i 4/7 + 2 i 5/7 = 3 i 9/7 = 4 i 2/7
d) 10 - 1/3 = 9 i 3/3 - 1/3 = 9 i 2/3
12 i 1/5 - 4/5 = 11 i 6/5 - 4/5 = 11 i 2/5
3 i 1/7 - 4 = - 6/7
e)2/11 * 5 = 10/11
5/8 * 2/3 = 10/24 = 5/12
( -2/3) *( -3/8) = - 2/1 * (- 1/8) = 2/8 = 1/4
f) 2/5 :3 = 2/5 * 1/3 = 2/15
3/7 : 1/2 = 3/7 * 2/1 = 6/7
- 5/8 : 1/3 = -5/8 * 3/1 = - 15/8
g) 0,8 + 0,4 = 1,2
1,2 -0,7 = 0,5
2,1 - 3 = -0,9
h) 0,3 * 2 = 0,6
1,6 *( -3 ) = - 4,8
0,4 :2 = 0,2
Zadanie 2
a) -4 * ( -2 -11) = -4*(-13) = 52
b) -7 +2 * (-5) = -7 - 10 = -17
c) -11 -12/(-6) = -11 + 2 = - 9
d) - 8 - 5 * (-4) -4 * (-6) = -8 +20 + 24 = 36