(2/7+5/8×8/7)÷9/35簡便計算
(2/7+5/8×8/7)÷9/35
=(2/7+5/7)÷9/35
=1÷9/35
=35/9
5.89-(5.89-2.35)+7.65怎樣簡便計算?
5.89-(5.89-2.35)+7.65
=(5.89-5.89)+(2.35+7.65)
=0+10
=10
用簡便計算:(-5.35)*(-3)+5.35*(-7)+5.35*4
(-5.35)*(-3)+5.35*(-7)+5.35*4=5.35*(3)+5.35*(-7)+5.35*4
=5.35*(3-7+4)
=0
125*25*50*40*4*8*2*5用簡便計算
125*25*50*40*4*8*2*5
=125*8*25*40*50*2*4*5
=1000*1000*100*20
=2000000000