\(5,65\cdot13,8+35,7\cdot3,21+5,56\cdot21,9+35,7\cdot1,14\)
\(=5,65\left(13,8+21,9\right)+35,7\left(3,21+1,14\right)\)
\(=5,65\cdot35,7+35,7\cdot4,35\)
\(=35,7\left(5,65+4,35\right)\)
\(=35,7\cdot10=357\)
tính bằng cách thuận tiện nhất
a.69,65+45,14+30,35+54,86
b.5,65x13,8+35,7x3,21+5,65x21,9+35,7x1,14
tinh bang cach thuan tien nhat phep tinh 1212/1515
tinh bang cach thuan tien nhat: 2,5x12,5x8x0,4
tinh bang cach thuan tien 56.83-34.18-16.63
tinh bang cach thuan tien 2,07+4.15+17,93 +5,85
tinh bang cach thuan tien : 8,27x0,02-3,35x0,01
tinh bang cach thuan tien nhat a) 48,25+12,72+51,75+87,28=??
tinh bang cach thuan tien
72,64 - ( 18,35 +9,29)
tinh bang cach thuan tien nhat 5,6x2+2,8+11,2x2-48,5
