www.1862.net > 136×27加27×31加27×34怎样简便计算

136×27加27×31加27×34怎样简便计算

136×27加27×31加27×34 =27×(136+31+34) =27×(200+1) =27×200+27 =5400+27 =5427

136x58+43x136-136x1 =136x(58+43-136)

136×27-65×27+27×29 =(136-65+29)x27 =100x27 =2700

运算定律与简便计算 (一)加减法运算定律 1.加法交换律 定义:两个加数交换位置,和不变 例如:16+23=23+16 546+78=78+546 2.加法结合律 定义:先把前两个数相加,或者先把后两个数相加,和不变。 注意:加法结合律有着广泛的应用,如果其中有...

1213÷87﹢78÷13,=1213×78+78×113,=(1213+113)×78,=1×78,=78; 0.4×713+25÷136+60%,=0.4×713+0.4×613+0.6,=0.4×(713+613)+0.6,=0.4×1+0.6,=1; 4×513+0.75×813,=0.75×(513+813),=0.75×1,=0.75.

136+136×99 =136×(1+99) =136×100 =13600

(1)756-3910+216-2.1=(756+216)-(3910+2.1)=10-6=4;(2)(23+16?34)÷136=23×36+16×36-34×36=24+6-27=3;(3)12×3.2+5.6×0.5+1.2×50%=12×(3.2+5.6+1.2)=12×10=5;(4)[53?(25+34)]÷314=[53-2320)]÷314=3160÷314=115.

=136*(41+59) =136*100 =13600

=(136-36)X36 =100X36 =3600

136x24-37x24+24 =24x(136+1-37) =24x100 =2400

网站地图

All rights reserved Powered by www.1862.net

copyright ©right 2010-2021。
www.1862.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com