1H07.E2 Uitwerkingen 2 ........................................................................................................
11
12 a 6,7 × –4 = -26,8
b 3,5 × –2,5 = -8,75
c 1,2 × –4,2 = -5,04
d –2,5 × 2,5 = -6,25
e –3,5 × –2,1 = 7,35
13 a 8 + −4 = e 6 − −9 – 3 − 7 =
8 - 4 = 4 6 + 9 - 3 - 7 = 5
b 5 − −2 = f 8 + −2 + 4 − −1 =
5 + 2 = 7 8 - 2 + 4 + 1 = 11
c −2 + −7 = g −12 + 3 + −3 =
-2 - 7 = -9 -12 + 3 - 3 = -12
d −9 − −11 = h −1 + −1 – 1 − −1 =
-9 + 11 = 2 -1 - 1 - 1 + 1 = -2
14 a 8 × 4 = 32 e 8 × −125 = -1000
b −6 × 5 = -30 f −7 × −11 = 77
c 2 × −9 = -18 g 4 × −125 = -500
d −1 × −13 = 13 h −3 × −2,5 = 7,5
15 a 3 × -7 = −21 e −4 × -4 = 16
b −6 × 3 = −18 f 4 × -7 = −28
c −2 × -4 = 8 g 0,25 × -8 = −2
d 8 × -9 = −72 h −12 × -5 = 60
16 A(-1, 3), B(-4, 1), C(-4, -2), D(-1, -1), E(1, -1), F(5, -5)
17 a 13 + ( -3 + -8 ) × 2 + -3 × -3 =
13 + ( -3 - 8 ) × 2 + -3 × -3 =
13 + -11 × 2 + 9 =
13 - 11 × 2 + 9 =
13 - 22 + 9 = 0
b -7 × -8 : -4 + 5 × -3 - 2 × -9 =
56 : -4 + -15 - -18 =
-14 - 15 + 18 = -11