Question

Oblicz:
a) 37 • 4 = (30 + 7) • 4 =............
37 • 4 = (40 - 3) • 4 = ...............
b) 8 • 48 = 8 • (...... +........) = .................
8 • 48 = 8 (...........-.........) =....................
c) 69 • 5 =...................................................................
69 • 5 =..........................................................

KTO PIERWSZY I DOBRZE DAJE NAJ!♥

Answer 1

a) 37·4 = (30+7)·4=30·4+7·4=120+28=148
37·4 = (40-3)·4 =40·4-3·4=160-12=148
b) 8·48 = 8·(40+8) =8·40+8·8=320+64=384
8·48 =8· (50-2)=8·50-8·2=400-16=384
c)69·5 =(60+9)·5=60·5+9·5=300+45=345
69·5 =(70-1)·5=70·5-1·5=350-5=345