Răspuns:
(39+27)×5=
66×5
330
(39+27)×5=
39×5+27×5
195+135
330
(64+84)×3=
148×3
444
(64+84)×3=
64×3+84×3
192+252
444
(143+257)×6=
400×6
2400
(143+257)×6=
143×6+257×6
858+1542
2400
(974-361)×6=
613×6
3678
(974-361)×6=
974×6-361× 6
5844-2166
3678
(2483+3156)×4=
5639×4
22556
(2483+3156)×4=
2483×4+3156×4
9944+12624
22556
(5615-2184)×3=
3431×3
10293
(5615-2184)×3=
5615×3-2184×3
16845-6552
10293