Question

Completeaza egalitatile :
6x(5+9)=...x5+...x9
(8+6)x5=8x...+....x5
8x(10+0)=8x....+....x.....
7x(3+6+8)=.....x......+....x......+.....x.....
Efectueaza in doua moduri:
5x(5+2)
8x(6-3)
(2+4)x9
(5-3)x6
(3+2+4)x10
(5+1+2)x9
8x(7-3)
10x(4+3-2)

Answer 1

=6×5+6×9
=8×5+6×5
=8×10+8×0
=7×3+7×6+7×8

5×7=35 sau 5×5+5×2=35
8×3=24 sau 8×6- 8×3=24
6×9=54 sau 2×9+4×9=54
2×6=12 sau 5×6-3×6=12
9×10=90 sau 3×10+2×10+4×10=90
8×9=72 sau 5×9+1×9+2×9=72
8×4=32 sau 8×7- 8×3 = 32
10×5=50 sau 10×4+10×3-10×2=50