2 số bớt đi số đơn vị là
9x2=18
tổng sau khi bớt đi là
268-18=250
tổng số phần bằng nhau
3+2=5
số lớn là
250:5x3=150+9=159
ds:159
250
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Bai 1 : Tong cua hai so la 2000. Neu so hang thu nhat them 135 don vi va so hang thu hai bot 531 don vi thi duoc tong moi la bao nhieu?
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cau7:tong 2 so bang 260 biet neu cung bot moi so di 6 don vi thi so lon gap 3 lan so be vay so be la