问题
解答题
|
答案
(1)
=21 X 32 8
32X=21×8
32X÷32=168÷32
X=5.25;
(2)X:12=
:2.87 4
2.8X=12×7 4
2.8X÷2.8=21÷2.8
X=7.5;
(3)
x-5=103 4
x-5+5=10+53 4
x=153 4
x3 4
=15÷3 4 3 4
x=20.
|
(1)
=21 X 32 8
32X=21×8
32X÷32=168÷32
X=5.25;
(2)X:12=
:2.87 4
2.8X=12×7 4
2.8X÷2.8=21÷2.8
X=7.5;
(3)
x-5=103 4
x-5+5=10+53 4
x=153 4
x3 4
=15÷3 4 3 4
x=20.