2,46+3,45+7,57
= ( 2,46+7,57)+3,45
=10+3,45
=13,45
2,46+3,45+7,57
= ( 2,46+7,57)+3,45
=10+3,45
=13,45
Tinh bang cach thuan tien nhat :
3,45 x 0,99 + 3,45 : 100
Tinh bang cach thuan tien nhat
A/ 3,45 *123 +4 *3,45 -3,45 * 27=
B/ 21,2 +7,63 + 8,8 +2,37=
lưu ý:DẤu *có nghĩa là nhân
tinh bang cach thuan tien nhat: 2,5x12,5x8x0,4
tinh bang cach thuan tien nhat a) 48,25+12,72+51,75+87,28=??
tính bang cach thuan tien nhat
2009x2011+401
2010x2010+400
tinh bang cach thuan tien nhat 5,6x2+2,8+11,2x2-48,5
tinh bang cach thuan tien nhat: 20/11x33/23x69/180
tinh bang cach thuan tien nhat phep tinh 1212/1515
tinh bang cach thuan tien nhat: (7,5x18,3+26,4x18,3)x(47x11-4700x0,1-47)