ldcf.net
当前位置:首页 >> 计算下面各题,能简算的要用简便方法计算.(1)50... >>

计算下面各题,能简算的要用简便方法计算.(1)50...

①9.6+1.8-1.5=11.4-1.5=9.9;②0.21+3.48+0.79=3.48+(0.21+0.79)=3.48+1=4.48;③15.3-(0.91+2.3)=15.3-2.3-0.91=13-0.91=12.09.

(1)50.34+11.645-42.34,=50.34-42.34+11.645,=8+11.645,=19.645;(2)99+99×99,=99×(1+99),=99×100,=9900;(3)8.64-(2.75+3.64)=8.64-2.75-3.64=8.64-3.64-2.75=5-2.75=2.25(4)15.07-7.34+20.93=15.07+20.93-7.34=36-7.34=28.6...

600÷50 =60÷5 =12

(1)23.4-5.7-4.3, =23.4-(5.7+4.3), =23.4-10, =13.4; (2)(467+36×3)÷23, =(467+108)÷23, =575÷23, =25; (3)25×50×4×6, =(25×4)×(50×6), =100×300, =30000; (4)46×16+16×54, =(46+54)×16, =100×16, =1600; ...

50x(4x8) =50x2x2x8 =100x2x8 =200x8 =1600 很高兴为你解答,希望能帮到你!

(1).50×0.125×0.02×8,=(50×0.02)×(0.125×8),=1×1,=1;(2).0.8×(4-3.75)×9.9,=0.8×0.25×9.9,=0.2×9.9,=0.2×(10-0.1),=0.2×10-0.2×0.1,=2-0.02,=1.98;(3)0.81×99+0.81,=0.81×99+0.81×1,=0.81×(99+1),=0.81×100,=81...

13/25-13/50+1/5 =13/50+1/5=23/50 3/4-(1/2+1/4) =3/4-1/4-1/2 =0 7/16+9/20-5/16+11/20 =(7/16-5/16)+(9/20+11/20) =1/8+1=9/8 1/10+3/8-2/5 =3/8+(1/10-2/5) =3/8-3/10 =3/2×(1/4-1/5)=3/40

(1)75-15.38+61.25-4.62=(75+61.25)-(15.38+4.62)=136.25-20=116.25;(2)765×64×0.5×2.5×0.125=765×(2×4×8)×0.5×2.5×0.125=765×(2×0.5)×(4×2.5)×(8×0.125)=765×1×10×1=7650;(3)50×96+57×4+7×66=50×96+(50+7)×4+7×66=50×96+...

5+137+45+63+50 =(5+45)+50+(137+63) =50+50+ 200 =300 13+46+55+54+8 =(46+54)+(50+5)+8+13 =100+50+(5+8)+13 =100+50+(13+13) =150+26 =176

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com