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CUM CALCULEZI RAPID!
10-1) = 35 x
9 = 35 x (
10-35 x 1 =
35 x
350-35=
315
35 x 99 = 35 × ( 100-1)= 35 x 100-35x1 = 3 500-35= 3 465
35 x 999 = 35 x (1 000-1)= 35 × 1 000 - 35 x 1 = 35 000-35= 34 965
Calculează, folosind procedeul de calcul rapid.
5 x 99
23 × 99
99 × 8
99 × 345
103 × 99
999 × 25
999 ×
63
222 × 999