Question

calculaza folosind procedeul preferat apoi verifica folosind calculatorul​

Answer 1

Răspuns:

245×25=6.125

548×44=24.112

687×14=9.618

343×15=5.145

506×15=7.590

435×25=10.875

208×28=5.824

205×11=2.255

sper ca te-am ajutat.

Answer 2

Răspuns:

a) 245x25 = 245x(10+10+5)=

= 245x10+245x10+245x5=

=2450+2450+1225=6125

548x44 = 548x(10+10+10+10+4)=

=548x10+548x10+548x10+548x10+548x4=

=5480+5480+5480+5480+2192=24112

b)687x14 = 687x(10+4)=

=687x10+687x4=

=6870+2748= 9618

343x15 = 343x(10+5)=

=343x10+343x5=

=3430+1715=5145

c)506x15=506x(10+5)=

=506x10+506x5=

=5060+2530=7590

435x25=435(10+10+5)=

=435x10+435x10+435x5=

=4350+4350+2175=10875

d)208x28=208(10+10+8)=

=208x10+208x10+208x8=

=2080+2080+1664=5824

205x11=205(10+1)

205x10+205

2050+205=2255

:)