Question

calculeaza

a) 7×3+3×9=
6×4+4×8=
7×3+3×3=
8×5-8×3=

b) (8+1)×3
(7+0)×5
8×(4+4)
(9-3)×7

c) 7×(9-4)
(7-1)×3
5×(8-6)
7×(10-3)

Answer 1

a) 21+27+24+32+21+9+40-32=142. b) 9x3=27 , 7x5=35 , 8x8=64 , 6x7=42. c)7x5=35 , 6x3=18 , 5x2=10 , 7x7=49

Answer 2

a) 7×3+3×9= 3×(7+9)= 3×16= 48
21+27= 48
6×4+4×8= 4×(6+8)= 4×14= 56
24+32= 56
7×3+3×3=3×(7+3)= 3×10= 30
21+9= 30
8×5-8×3= 8×(5-3)= 8×2= 16
40-24= 16

b) (8+1)×3= 8×3+1×3= 24+3= 27
9×3= 27
(7+0)×5= 7×5+0×5= 35+0= 35
7×5= 35
8×(4+4)= 8×4+8×4= 32+32= 64
8×8= 64
(9-3)×7= 9×7-3×7= 63-21= 42
6×7= 42

c) 7×(9-4)= 7×9-7×4= 63-28= 35
7×5= 35
(7-1)×3= 7×3-1×3= 21-3= 18
6×3= 18
5×(8-6)= 5×8-5×6= 40-30= 10
5×2= 10
7×(10-3)= 7×10-7×3= 70-21= 49
7×7= 49