3/4.5/2.7/6
0.31 × 2 ×45.8 + 8.4 × 0.27 × 3
3.7*3.8+8.3*3.7-0.4*3.7*5
3.7*3.8+8.3*3.7-0.4*3.7*5
1 5/7 *3/4 10/11:1 1/3 3.57*4.1+2.43*4.1 3.42:0.57*8.4-6.8
3.42:0.57*8.4-6.8
x / 8.4 + x / 1.6 = 26.3
Tính bằng cách thuận tiện nhất :
a / 2 x 4 x 8 x 0.5 x 0.125 x 0.25 x ( 0.4321 + 0.5679 )
b /3.7 x 3.8 + 8.3 x 3.7 - 0.4 x 3.7 x 5
K * 1.2 + K * 8.4 + K+ K * 0.6 = 28