Question

Calculați in doua moduri:
a 17•(105+95)
b (24+16)•15
c 32•(47-37)
d (257-17)•10
e 1024•379+1024•121-1024•450
f. (111+222+333+444):111+10




Va rog repede dau coroana!!!

Answer 1

a) 17×(105+95)=

17×105+17×95=

b) (24+16)×15=

15×24+15×16

c,d,f la fel

Answer 2

Explicație pas cu pas:

a) 17 × (105 + 95)

1: 17 × 200 = 3400

2: 17 × 105 + 17 × 95 = 1785 + 1615 = 3400

b) (24 + 16) × 15

1: 40 × 15 = 600

2: 24 × 15 + 16 × 15 = 360 + 240 = 600

c) 32 × (47 - 37)

1: 32 × 10 = 320

2: 32 × 47 - 32 × 37 = 1504 - 1184 = 320

d) (257 - 17) × 10

1: 240 × 10 = 2400

2: 257 × 10 - 17 × 10 = 2570 - 170 = 2400

e) 1024 × 379 + 1024 × 121 - 1024 × 450

1: 388096 + 123904 - 460800 = 51200

2: 1024 × (379 + 121 + 450) = 1024 × 950 = 51200