Question

calcula utilizando la propiedad distributiva
1. 3(8 + 4) =
2. 3(5 − 4) =
3. (2 + 5)(3 + 4) =
4. (1 + 5)(7 + 9) =
5. 2(5 − 4) + (7 × 3) + 5(1 + 4) =
6. 4(7 − 3) + 5(3 + 8) =
a) 60 × (13 + 2) = 60 × 13 + 2
b) 40 × (8 + 7) = 40 × 8 + 40 × 7
c) (13 + 7) × 10 = 13 × 10 + 7 × 10
d) (8 + 7) × 5 = 8 × 7 × 5 ayuda porfa

Answer 1

Respuesta:

Explicación paso a paso:

1.-  3 ( 8 + 4 ) = 3x8 + 3x4 = 24 + 12 = 36

2.- 3 ( 5 - 4 ) = 3x5 - 3x4 = 15 - 12 = 3

3.- (2+5)(3+4) = 2x3 + 2x4 + 5x3 + 5x4 = 6 + 8 + 15 + 20 = 49

4.- (1+5)(7+9) = 1x7 + 1x9 + 5x7 + 5x9 = 7 + 9 + 35 + 45 = 96

5.- 2 (5-4)+(7x3)+5 (1+4) = 2x5 - 2x4 + 7x3 + 5x1 + 5x4 = 10 - 8 + 21 + 5 + 20 =48

6.- 4(7-3) + 5(3+8) = 4x7 - 4x3 + 5x3 + 5x8 = 28 - 12 + 15 + 40 = 71

a) 60 (13 + 2)  = 60x13 + 60x2 = 780 + 120 = 900

b) 40 (8 + 7) = 40x8 + 40x7 = 320 + 280 = 600

c) (13+7)x10 = 13x10 + 7x10 = 130 + 70 = 200

d) (8+7)x5 = 8x5 + 7x5 = 40 + 35 = 75