wkhl.net
当前位置:首页 >> 脱式计算(能简算的要简算)(1)1.8×2.58+0.5+1.4... >>

脱式计算(能简算的要简算)(1)1.8×2.58+0.5+1.4...

(1)1.8×2.58+0.5+1.42×1.8=1.8×(2.58+0.5+1.42)=1.8×4.5=8.1(2)(54.7-17.5)×(0.45÷0.9)=37.2×0.5=18.6(3)52.91-311113-18213=52.91-(311113+18213)=52.91-50=2.91(4)15-8811+212=(15-8+2)-(811-12)=9-522=81722

8.58×39+58 =58×(39+1) =58×40 =2320

45X12+12x58一3 =12x(45+58)一3 =12x103一3 =12x100+12x3-3 =1200+36一3 =1200+33 =1233

脱式计算 (3.46+2.58)\0.4 =6.04÷0.4 =15.1

(1)1.8×2.58+0.5+1.42×1.8=1.8×(2.58+1.42)+0.5=1.8×4+0.5=7.2+0.5=7.7;(2)(54.7-17.5)×(0.45÷0.9)=37.2×0.5=18.6;(3)1.5×(0.1÷0.2)-0.18÷0.36=1.5×0.5-0.5=0.75-0.5=0.25;(4)93.6÷[(54.8+45.2)×(6-5.46)]=93.6÷[100×0.5...

(1)1.18×2.58+0.5+1.42×1.18=1.18×(2.58+1.42)+0.5=1.18×4+0.5=4.72+0.5=5.22;(2)(21.85-17.5)×(0.45÷0.9)=4.35×0.5=2.175;(3)1.75×(0.1÷0.2)-0.18÷0.9=1.75×0.5-0.2=0.875-0.2=0.675;(4)93.6÷[(54.8+45.2)×(6-5.46)]=93...

①(50-40×1.2)÷0.5=(50-48)÷0.5=2÷0.5=4;②8×4×125×25=(8×125)×(4×25)=1000×100=100000;③18.8- 2 3 -3.8- 1 3 =(18.8-3.8)-( 2 3 + 1 3 )=15-1=14;④32×71.1+28.9×32=32×(71.1+28.9)=32×100=3200.

2.58x4.2+45.6 =10.836+45.6 =10.836+45+0.6 =55.836+1-0.4 =56.436

(1)216+384+404+796,=(216+384)+(404+796),=600+1200,=1800;(2)154-(54+98),=154-54-98,=100-98,=2;(3)17×25×4,=17×(25×4),=17×100,=1700;(4)160-60÷2,=160-30,=130;(5)420÷35,=(420÷7)÷(35÷7),=60÷5,...

(1)15.58÷8.2-0.72,=1.9-0.72,=1.18;(2)9.6+9.9×99,=(9.9-0.3)+9.9×99,=9.9+9.9×99-0.3,=9.9×(1+99)-0.3,=9.9×100-0.3,=990-0.3,=989.7;(3)8×3.6+1.4×2.8,=28.8+3.92,=32.72;(4)0.74×4×0.25×4,=(0.74×4)×(0.25×4)...

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