Răspuns:
Explicație pas cu pas:
a)
723 × 4 972 - 723 × 4 541 + 723 × 569 = 723 000
= 723 × ( 4 972 - 4 541 + 569 ) =
= 723 × ( 431 + 569 ) =
= 723 × 1 000 =
= 723 000
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b)
2 783 × 5 821 + 2 783 × 2 057 - 2 783 × 7 877 =
= 2 783 × ( 5 821 + 2 057 - 7 877 ) =
= 2 783 × ( 7 878 - 7 877 ) =
= 2 783 × 1 =
= 2 783
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c)
41 783 × 58 912 - 41 753 × 58 912 + 58 912 × 41 + 58 912 × 29 =
= 58 912 × ( 41 783 - 41 753 + 41 + 29 ) =
= 58 912 × ( 30 + 70 ) =
= 58 912 × 100 =
= 5 891 200
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d)
71 496 × 3 189 - 71 496 × 3 180 + 71 496 =
= 71 496 × ( 3 189 - 3 180 + 1 ) =
= 71 496 × ( 9 + 1 ) =
= 71 496 × 10 =
= 714 960
