12.5x4x8x2.5= 1.25x7.7+2.3= 100-123.1x0.3= 2.14+0.39除以1.3= 1.25x707+1.25x2.3= 2.1x5.5= 这些要简便
如题所述
1.25x7.7+2.3x1.25=1.25x(7.7+2.3)=1.25x10=12.5
100-123.1x0.3=100+100x0.3+23.1x0.3=100x1.3+23.1x0.3=130+6.93=136.93
2.14+0.39除以1.3=2.14+(39/13)/10=2.14+3/10=2.44
1.25x70.7+1.25x2.3=1.25x(70.7+2.3)=1.25x73=91.25
2.1x5.5=2.1x(5+0.5)=2.1x5+2.1x0.5=10.5+1.05=11.55
急需小学五年级口算370道!不要答案!!
0.7×8= 10.3×2= 5×0.6= 0.9×0.3= 3.5×0.2= 2.01×0= 10×0.05= 0.13×7= 0.21×100= 0.7×4= 0.05×4= 4×0.3= 12.5×8= 2.3×4= 3.25×0= 0.4×50= 30×0.1= 2.6×3= 4.1×2= 0.35×0.2= 7.5×0.1= 1-0.08= 3.5×0.01= 1.25÷0.25= 0×9.8= 3.9+0.39= 4.8+5.2= 0.5×0.4 ...
求:小学五年级口算题(越多越好)谢谢
1.(1+1\/2)(1+1\/3)(1+1\/4)...(1+1\/100)2.(1-1\/2)(1-1\/3)(1-1\/4)...(1-1\/100)3.8+2-8+2 4.25*4\/25*4 5.7.26-(5.26-1.5)6.286+198 7.314-202 8.526+301 9.223-99 10.6.25+3.85-2.125+3.875 11.9-2456*21 12.0.5\/11.5-4*2.75 13.1\/...
五年级数学口算题
8\/19*16=38 61\/60*122=120 7\/2*28=8 6\/1*48=8 9\/7*18=14 25\/7*100=28 9\/5*81=45 8\/9*16=18 17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12 14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5 10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44 0.7...
请大家赶紧给我出300道口算题.急!
1.25÷0.25＝ 0×9.8＝ 3.9＋0.39＝ 4.8＋5.2＝ 0.5×0.4 ＝ 4×0.25＝ 3÷6＝ 8.1÷9＝ 2.5×4＝ 6－0.025＝ 3.6＋6.3＝ 0.05×4＝ 3.5×0＝ 0÷3.5＝ 0.9×0.3＝ 1×0.06＝ 9×0.5＝ 1.25×8＝ 2.6×3＝ ...
