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calculeaza in doua moduri. 7×(4+6)= . (9-5)×9=; 3×(5+2)=; 6×(7+1)=; 8×(8-3)=

Răspuns :

7×(4+6)=
7×10
=70

7×(4+6)=
7×4+7×6
=28+42
=70

(9-5)×9
4×9
=36
(9-5)×9
9×9-9×5
81-45
=36

3×(5+2)=
=3×7
=21
3×(5+2)=
3×5+3×2=
15+6
=21

6×(7+1)=
=6×8
=48
6×(7+1)=
6×7+6×1
=42+6
=48

8×(8-3)=
8×5
=40
8×(8-3)=
8×8-8×3
64-24
=40