\(4+45\times2+450\times3+497\times4\)
\(=4\left(497+1\right)+45\times2+45\times30\)
\(=498\times4+45\left(2+30\right)\)
\(=498\times4+45\times32\)
\(=498\times4+360\times4\)
\(=4\left(498+360\right)\)
\(=4\times858=3432\)
\(4+45\times2+450\times3+497\times4\)
\(=4\left(497+1\right)+45\times2+45\times30\)
\(=498\times4+45\left(2+30\right)\)
\(=498\times4+45\times32\)
\(=498\times4+360\times4\)
\(=4\left(498+360\right)\)
\(=4\times858=3432\)
Tính giá trị của biểu thức 2 6 : 4 5 x 2
(1+3+5+7+...+97+99)x(45x3-45x2-45)
4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 x 2 : 2 =...........
đúng ghi Đ sai ghi S
a)1-3/4+1/4=1-3+1/4 b)1-3/4+1/4=4/4-3/4+1/4
=1-1=0[ ] 1/4+1/4=1/2[ ]
4 tỷ x 4 tỷ 4 ngìn x 4 ngìn 4 ngìn x 4 4 tỷ x 4
4/3x7 + 4/7x11 + 4/11x15 + 4/15x9 + 4/19x23 + 4/23x27
4/3x7 + 4/7x11 + 4/11x14 + 4/15x19 + 4/19x23 + 4/23x27
Tính nhanh A = 4/3x7 + 4/7x11 + 4/11x15 + 4/15x19 + 4/19x23 + 4/23x27
A 3/4; 2/3; 4/3
B 4/3; 3/4; 2/3
C 2/3; 3/4; 4/3
4/3; 2/3; 3/4
4/3+4/6+4/12+4/24+...+4/768