Ответ:
Пошаговое объяснение:
19 × 90 + 19 × 9 × 10=19*(90+9*10)=19*180=3420
72 × 14 + 72 × 10 × 4=72*(14+10*4)=72*54=3888
38 × 12 - 38 × 8=32*(12-8)=32*4=128
36 × 5 × 10 + 37 × 15 =36*50+37*15=1800+555=2355
909 × 15 - 909 × 10=909*(15-10)=909*5=4545
302 × 36 - 302 × 16=302*(36-16)=302*20=6040
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Ответ:
Пошаговое объяснение:
19 × 90 + 19 × 9 × 10=19*(90+9*10)=19*180=3420
72 × 14 + 72 × 10 × 4=72*(14+10*4)=72*54=3888
38 × 12 - 38 × 8=32*(12-8)=32*4=128
36 × 5 × 10 + 37 × 15 =36*50+37*15=1800+555=2355
909 × 15 - 909 × 10=909*(15-10)=909*5=4545
302 × 36 - 302 × 16=302*(36-16)=302*20=6040