Question

Va rog sa ma ajutati nu stiu trebuie rezolvat în două moduri de exemplu 7×9=6×9+9=54+9 sau7×9=(7+4)+(7×5)=28+35 va rog sa ma ajutati 8×9= 4×7= 7×9= 9×9= 7×10= 10×6= 6×6= 5×8= 4×6= 4×6= 8×5= 9×9= 10×10= 7×7= 9×10= 8×8= 1×7=

Answer 1

Răspuns:

Explicație pas cu pas:

8 × 9 = 7 × 9 + 9 = 63 + 9 = 72 → primul mod

8 × ( 4 + 5) = 8 × 4 + 8 × 5 = 32 + 40 = 72 → al doilea mod

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4 × 7 = 3 × 7 + 7 = 21 + 7 = 28

4 × ( 2 + 5 ) = 4 × 2 + 4 × 5 = 8 + 20 = 28

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7 × 9 = 6 × 9 + 9 = 54 + 9 = 63

7 × ( 4 + 5) = 7 × 4 + 7 × 5 = 28 + 35 = 63

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9 × 9 = 8 × 9 + 9 = 72 + 9 = 81

9 × ( 4 + 5) = 9 × 4 + 9 × 5 = 36 + 45 = 81

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7 × 10 = 6 × 10 + 10 = 60 + 10 = 70

7 × ( 5 + 5 ) = 7 × 5 + 7 × 5 = 35 + 35 = 70

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10 × 6 = 9 × 6 + 6 = 54 + 6 = 60

10 × 6 = 10 × ( 1+5) = 10 × 1 + 10 × 5 = 10 + 50 = 60

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6 × 6 = 5 × 6 + 6 = 30 + 6 = 36

6 × ( 1 + 5 ) = 6 × 1 + 6 × 5 = 6 + 30 = 36

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5 × 8 = 4 × 8 + 8 = 32 + 8 = 40

5 × ( 3 + 5 ) = 5 × 3 + 5 × 5 = 15 + 25 = 40

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4 × 6 = 3 × 6 + 6 = 18 + 6 = 24

4 × ( 1 + 5 ) = 4 × 1 + 4 × 5 = 4 + 20 = 24

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8 × 5 = 7 × 5 + 5 = 35 + 5 = 40

8 × ( 2 + 3 ) = 8 × 2 + 8 × 3 = 16 + 24 = 40

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10 × 10 = 9 × 10 + 10 = 90 + 10 = 100

10 × ( 5 + 5 ) = 10 × 5 + 10 × 5 = 50 + 50 = 100

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7 × 7 = 6 × 7 + 7 = 42 + 7 = 49

7 × ( 2 + 5 ) = 7 × 2 + 7 × 5 = 14 + 35 = 49

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9 × 10 = 8 × 10 + 10 = 80 + 10 = 90

9 × ( 5 + 5 ) = 9 × 5 + 9 × 5 = 45 + 45 = 90

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8 × 8 = 7 × 8 + 8 = 56 + 8 = 64

8 × ( 3 + 5 ) = 8 × 3 + 8 × 5 = 24 + 40 = 64

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1 × 7 = 0 × 7 + 7 = 0 + 7 = 7

1 × ( 2 + 5 ) = 1 × 2 + 1 × 5 = 2 + 5 = 7