Question

(2)
Observă modelul şi efectuează:
7 x 37 = 7 * (30 + 7)
85 x 9=
= 7 x 30 + 7 x 7
5x74=
= 210 + 49
8 x 49 =
= 259
75 x 6 =
38 x 6 =
9 x 96 =
6 x 79 =
7x54=
48 x 8 =
5 x 84 =
4 x 36 =
7 x 88 =
​

Answer 1

Răspuns:

85×9 =9×(80+5)

= 9×80+9×5

=720+45

=765

5×75 =5×(70+5)

5×70+5×5

=250+25

=275

8×45=8×(40+5)

=8×40+8×5

= 320+40

=360

75×6= 6×(70+5)=6×70+6×5 = 420+30=450

38×6 = 228

9×96=864

6×79= 474

7×54= 378

48×8 = 386

5×84=420

4×36=144

7×88= 615