我要小学五年级数学简便算法试题40道快
我要小学五年级数学简便算法试题40道
快
我要小学五年级数学简便算法试题40道快
我要小学五年级数学简便算法试题40道
快
101×8245.2×10+52.1×100.125×3.2×254.37×99+4.374.2÷2÷3.592×25=22×11+22+288×22=
(214+43+86)+257=
578-53-92-255=
361×40×125=
199×35=
365-(247-235)=
48×125=
200×22=)(88+104)+9624+42+76+58
25*5)*2
117*3+117*7167*2+167*3+167*5528-53-471、7.5*3.1/2.5*100
=7.5/2.5*3.1*100
=3*3100
=9300
2、36.5*6.2+28*0.365+3.65
=36.5*6.2+2.8*3.65+3.65
=3.65*(6.2+2.8+1)
=3.65*1.
=36.5
3、999.9*599.9+199.9
=1000×599+0.1×599.9+200-0.1
=5990+59.9+200-0.1
=6049.9+200-0.1
=6249.9-0.1
=6249.8
999.9*599.9+199.9
=(1000-0.1)*599.9+(200-0.1)
=1000*599.9-0.1*599.9+200-0.1
=599900-599.99+200-0.1
=599900-(600-0.1)+200-0.1
=599900-600+0.1+200-0.1
=599900-600+200
=599500
999.9X599.9+199.9
=(1000-0.1)X599.9+(200-0.1)
=1000X599.9-0.1X599.9+200-0.1
=599900-59.99+200-0.1
=599900-(60-0.01)+200-0.1
=599900-60+0.01+200-0.1
=599900+200+0.01-60-0.1
=600039.91
999.9×599.9+199.9
=(1000-0.1)×599.9+199.9
=1000×599.9-0.1×599.9+199.9
=599900-59.9+199.9
=599900+140
545-167-145
28*225-2*225-6*225
39*8+6*39-39*4
127+133+184+24022x98+4454+34+(66+46)
97×95+5×97=