Question

/Calculează, folosind procedeul preferat. Verifică, folosind calculatorul.
38 x 98
96 x 34
23 x 12
67 x 39
Observă cum poţi calcula rapid!
75 x 72
93 x 94
Dacă ştii...
34 x 25
88 x 77
15 x 10 = 150
67 x 76
67 x 98
...atunci poti afla
15 x 11= 15 (10 + 1) = 15 x 10 + 15 x 1
= 150 + 15 = 165
ajutor repede va rog va las poza​

Answer 1

98×(30+8)=98×30+98×8=2940+784=3724

34×(90+6)=34×90+34×6=3060+204=3264

23×(10+2)=23×10+23×2=230+46=276

67×(30+9)=67×30+67×9=2010+603=2613

75×(70+2)=75×70+75×2=5250+150=5400

93×(90+4)=93×90+93×4=8370+372=8742

34×(20+5)=34×20+34×5=680+170=850

88×(70+7)=88×70+88×7=6160+616=6776

67×(70+6)=67×70+67×6=4690+402=5092

67×(90+8)=67×90+67×8=6030+536=6566