Sagot :
a) 102x38
(100x38)+(2x38)
3800+76=3876
b) 21x35
(20x35)+(1x35)
700+35=735
c) 99x75
(100x75)-(1x75)=7500-75=7425
d) 98x2,5
(100x2,5)-(2x2,5)
250-5=245
(100x38)+(2x38)
3800+76=3876
b) 21x35
(20x35)+(1x35)
700+35=735
c) 99x75
(100x75)-(1x75)=7500-75=7425
d) 98x2,5
(100x2,5)-(2x2,5)
250-5=245
Bonsoir
a) 102 x 38 ;
a) (100 x 38) + (2 x38) = 3 800 + 76 = 3 876
b) 21 x 35 = (20x 35) + 35 = 700 +35 = 735
c) 99 x 75 = (100 x 75) -( 1 x75) = 7500 - 75 = 7 425
d) 98 x 2,5 = (100 x 2.5) - (2 x 2.5) = 250 -5 = 245
a) 102 x 38 ;
a) (100 x 38) + (2 x38) = 3 800 + 76 = 3 876
b) 21 x 35 = (20x 35) + 35 = 700 +35 = 735
c) 99 x 75 = (100 x 75) -( 1 x75) = 7500 - 75 = 7 425
d) 98 x 2,5 = (100 x 2.5) - (2 x 2.5) = 250 -5 = 245