11. Вычислите удобным способом (10 баллов).
1 1 ( 1 0* 3 )=
2 9 *(28* 5 ) =
1 0 *(2 9 *2 ) =
1 1 ( 1 0* 3 )=
2 9 *(28* 5 ) =
1 0 *(2 9 *2 ) =
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Answers & Comments
1) 11*(10*3)=11*30=330
2) 29*(28*5)=29*(20*5+8*5)=29*(100+40)=29*140=20*140+9*140=2800+1260=4060
3) 10*(29*2)=10*(20*2+9*2)=10*(40+18)=10*58=10*50+10*8=500+80=580
2) 4060
3) 580
Вот ;)