登录
三、计算下面各题。
460÷(109-946÷11) 25×32÷(155-139)
44×[169-(78+35)] 72÷[960÷(245-165)]
460÷(109-946÷11) 25×32÷(155-139)
44×[169-(78+35)] 72÷[960÷(245-165)]
答案
三、$20$ $50$ $2464$ $6$
解析
460÷(109-946÷11)
=460÷(109-86)
=460÷23
=20
25×32÷(155-139)
=25×32÷16
=25×2
=50
44×[169-(78+35)]
=44×[169-113]
=44×56
=2464
72÷[960÷(245-165)]
=72÷[960÷80]
=72÷12
=6
=460÷(109-86)
=460÷23
=20
25×32÷(155-139)
=25×32÷16
=25×2
=50
44×[169-(78+35)]
=44×[169-113]
=44×56
=2464
72÷[960÷(245-165)]
=72÷[960÷80]
=72÷12
=6
四、计算下面图形的面积。
答案
四、$8×2÷2=8(cm^{2})$ $7×10=70(dm^{2})$ $(17+19)×8÷2=144(m^{2})$ $(4+8)×6÷2-4×2÷2=32(m^{2})$
