Question

1.Calculati:
a)2,45·7; b)7,82·50; c)31,4·20; d)18,66·2,5·12; e)5,08·8,05·100; f)12,03·2,05·2,4; g)3,72·10; h)2,8·5,91; i)4,44·10,8; j)100·0,5429; k)0,365+14; l)0,365·14.. Scrieti doar raspunsurile, dau coroana!!!

Answer 1

a)17,15
b)391
c)628
d)559,8
e)4089,4
f)59,1876
g)37,2
h)16,548
i)47,952
j)54,29
k)14,365
l)5,11

Answer 2

2,45 × 7 = 245 × 7 supra 10 = 1715 supra 10 = 171,5

7,82 × 50 = 782 × 50 supra 10 = 39100 supra 10 = 3910

31,4 × 20 = 314 × 20 supra 10 = 628

18,66×2,5×12= 1866×25×12 supra 1000= 559800 supra 1000 = 559,8

5,08 × 8,05 × 100 = 508 × 8,05 = 4809,4

12,03 × 2,05 × 2,4 = 1203 × 205 × 24 supra 100000 = 5918760 supra 100000 = 59,18760

3,72 × 10 = 37,2

2,8 × 5,91 = 28×591 supra 1000 = 16458 supra 1000 = 16,458

4,44 × 10,8 =444 × 108 supra 1000 = 47952 supra 1000 = 47,952

100 × 0,5429 = 54,29

0,365+14 = 14,365

0,365 × 14 = 365 × 14 supra 1000 = 5110 supra 1000 = 5,11