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2022-04-16 21:42:10
Ta có sơ đồ *
SL1 (2 đơn vị) * (2 đơn vị) * (2 đơn vị) * (2 đơn vị) * (2 đơn vị) * (2 đơn vị) * (2 đơn vị) * (2 đơn vị) SL2
Hiệu của 2 số lẻ này là:
2x8=16
SL1 là:
(84+16):2=50
SL2 là:
84-50=34
2022-04-16 20:42:29
Tổng CD và CR là:
80:2=40(cm)
CD là:
40-8=32(cm)
S hcn là:
32x8=256(cm2)
2022-04-16 20:39:22
b
2022-04-15 20:37:50
Đổi 2h30p=2,5h
Đoạn đường người đó đi ô tô dài là:
105-15=90(km)
Vận tốc ô tô đi là:
90:2,5=36(km/h)